(Comparing Data LC) : The histograms display the frequency of temperatures in two different locations in a 30-day period.

A graph with the x-axis labeled Temperature in Degrees, with intervals 60 to 69, 70 to 79, 80 to 89, 90 to 99, 100 to 109, 110 to 119. The y-axis is labeled Frequency and begins at 0 with tick marks every one unit up to 14. A shaded bar stops at 10 above 60 to 69, at 9 above 70 to 79, at 5 above 80 to 89, at 4 above 90 to 99, and at 2 above 100 to 109. There is no shaded bar above 110 to 119. The graph is titled Temps in Sunny Town.
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A graph with the x-axis labeled Temperature in Degrees, with intervals 60 to 69, 70 to 79, 80 to 89, 90 to 99, 100 to 109, 110 to 119. The y-axis is labeled Frequency and begins at 0 with tick marks every one unit up to 14. A shaded bar stops at 10 above 60 to 69, at 9 above 70 to 79, at 5 above 80 to 89, at 4 above 90 to 99, and at 2 above 100 to 109. There is no shaded bar above 110 to 119. The graph is titled Temps in Sunny Town.

Question:
When comparing the data, which measure of variability should be used for both sets of data to determine the location with the most consistent temperature?
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Possible Answers:
(A) IQR, because Sunny Town is symmetric
(B) IQR, because Beach Town is skewed
(C) Range, because Sunny Town is skewed
(D) Range, because Beach Town is symmetric

Answers

Answer 1

The correct answer is (A) IQR, because Sunny Town is symmetric.

What is Interquartile Range (IQR)?

The Interquartile Range (IQR) is a measure of variability that is based on the spread of the middle 50% of the data. It is less affected by extreme values and outliers compared to the range, which is the difference between the highest and lowest values in a dataset.

According to the given information:

In this case, since the data in Sunny Town is symmetric, meaning it is evenly distributed around the center without any skewness, the IQR would be an appropriate measure of variability. The symmetric distribution indicates that the data points are equally distributed on both sides of the central tendency, and the IQR would provide a good measure of the spread of the middle 50% of the data.

On the other hand, if the data in Beach Town was skewed, meaning it is not evenly distributed and has a longer tail on one side, the IQR may not be as reliable, and the range might be affected by extreme values. In such cases, using the range as a measure of variability may not be as accurate.

So, the correct answer is (A) IQR, because Sunny Town is symmetric.

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Related Questions

A random sample of 100 middle schoolers were asked about their favorite sport. The following data was collected from the students.


Sport Tennis Soccer Baseball Basketball
Number of Students 17 12 27 44


Which of the following graphs correctly displays the data?
bar graph with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled tennis going to a value of 17, the second bar labeled soccer going to a value of 12, the third bar labeled baseball going to a value of 27, and the fourth bar labeled basketball going to a value of 44

histogram with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled tennis going to a value of 17, the second bar labeled soccer going to a value of 12, the third bar labeled baseball going to a value of 27, and the fourth bar labeled basketball going to a value of 44

bar graph with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled soccer going to a value of 17, the second bar labeled tennis going to a value of 12, the third bar labeled basketball going to a value of 27, and the fourth bar labeled baseball going to a value of 44

histogram with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled soccer going to a value of 17, the second bar labeled tennis going to a value of 12, the third bar labeled basketball going to a value of 27, and the fourth bar labeled baseball going to a value of 44

Answers

The graph that correctly displays the data is a histogram. The correct option is b.

What are histograms?

The correct graph to display this data would be a bar graph with the title "Favorite Sport" the x-axis labeled "Sport" and the y-axis labeled "Number of Students."

The first bar should be labeled "Tennis" going to a value of 17, the second bar labeled "Soccer" going to a value of 12, the third bar labeled "Baseball" going a value of 27, and the fourth bar labeled "Basketball" going to a value of 44.

Therefore, the correct option is B. histogram with the title favorite sport and the x-axis labeled sport, and the y-axis labeled number of students, with the first bar labeled tennis going to a value of 17, the second bar labeled soccer going to a value of 12, the third bar labeled baseball going to a value of 27, and the fourth bar labeled basketball going to a value of 44

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Select the correct answer.
Find the value of x.
log 8 = 0.5
A. 16
B. 4
Next →
C. 64
D. 32
Properties of Logarithms
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Answers

Answer:

C

Step-by-step explanation:

using the rule of logarithms

[tex]log_{b}[/tex] x = n ⇒ x = [tex]b^{n}[/tex]

and [tex]x^{0.5}[/tex] = [tex]\sqrt{x}[/tex]

given

[tex]log_{x}[/tex] 8 = 0.5 , then

8 = [tex]x^{0.5}[/tex] = [tex]\sqrt{x}[/tex] ( square both sides )

8² = ( [tex]\sqrt{x}[/tex] )²

64 = x

Ron wants to rent a car. He is offered two payment options, which are shown in the table. Which number line shows the number of miles that will make Option A less expensive than Option B? Daily Cost ($) 25 10 A B Payment Option A B ++ + 0 10 20 30 40 50 60 70 80 90 100 Cost per Mile ($) 0.15 0.40 011++ 0 10 20 30 40 50 60 70 80 90 100 C++ + 0 10 20 30 40 50 60 70 80 90 100 D4 0 +++ 10 20 30 40 50 60 70 80 90 100​

Answers

The number line that shows the number of miles where A is less expensive has a solution of x > 60

Selecting the number line that shows the number of miles

From the question, we have the following parameters that can be used in our computation:

Option    Daily Cost ($) Cost per mile ($)

   A               25                   0.15  

   B                10                    0.40

So, the cost functions are

A = 25 + 0.15x

B = 10 + 0.4x

Where x is the number of miles

When A is less expensive, we have

25 + 0.15x < 10 + 0.4x

Evaluate the like terms

15 < 0.25x

So, we have

0.25x > 15

Divide

x > 15/0.25

Evaluate

x > 60

Hence, the number line is (a)

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Decide if the following situation is a permutation or combination and solve. A coach needs five starters from the team of 12 players. How many different choices are there?

Answers

Answer: This situation involves choosing a group of 5 players out of a total of 12 players, where the order in which the players are chosen does not matter. Therefore, this is an example of a combination problem.

The number of ways to choose a group of 5 players out of 12 is given by the formula for combinations:

n C r = n! / (r! * (n-r)!)

where n is the total number of players, r is the number of players being chosen, and "!" represents the factorial operation.

In this case, we have n = 12 and r = 5, so the number of different choices of starters is:

12 C 5 = 12! / (5! * (12-5)!)

= 792

Therefore, there are 792 different choices of starters that the coach can make from the team of 12 players.

Step-by-step explanation:

you are thinking of combining designer whey and muscle milk to obtain a 7-day supply that provides exactly 262 grams of protein and 54 grams of carbohydrates. how many servings of each supplement should you combine in order to meet your requirements?

Answers

We need approximately 12 servings of Designer Whey and 2 servings of Muscle Milk to obtain a 7-day supply that provides exactly 262 grams of protein and 54 grams of carbohydrates.

Let x be the number of servings of Designer Whey and y be the number of servings of Muscle Milk needed to obtain a 7-day supply that provides exactly 262 grams of protein and 54 grams of carbohydrates.

From the information given, we know that each serving of Designer Whey provides 20 grams of protein and 3 grams of carbohydrates, and each serving of Muscle Milk provides 16 grams of protein and 9 grams of carbohydrates.

Therefore, we can set up the following system of equations:

20x + 16y = 262

3x + 9y = 54

To solve for x and y, we can use any method of solving a system of equations. For example, we can use substitution:

From the second equation, we can solve for x in terms of y:

x = (54 - 9y)/3 = 18 - 3y

Substituting this into the first equation, we get:

20(18 - 3y) + 16y = 262

Simplifying, we get:

80y = 182

Solving for y, we get:

y = 2.275

Substituting this into the equation x = 18 - 3y, we get:

x = 12.175

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in general, if sample data are such that the null hypothesis is rejected at the a 5 1% level of significance based on a two-tailed test, is h0 also rejected at the a 5 1% level of significance for a corresponding onetailed test? explain.

Answers

The directionality of the alternative hypothesis and the support offered by the sample data determine whether the null hypothesis is likewise rejected at the 5% level of significance for a related one-tailed test.

When the two-tailed test rejects the null hypothesis, it means that the sample data, regardless of how we look at it, support the null hypothesis.. A one-tailed test, however, simply considers the evidence in one way. As a result, the null hypothesis should be used if the sample data only show evidence that the alternative hypothesis is true in one direction (for example, greater than).

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4.834 * 10 ^ 9 as an ordinary number

Answers

Answer:

4834000000

That is your answer.

An 840-foot TV transmitter is secured by guy wires attached from the top of the tower to the ground. The wires are attached to the ground 130 feet from the base of the transmitter. How long are the guy wires?​

Answers

the guy wires are 850 feet long. We can use the Pythagorean theorem to solve this problem.

what is Pythagorean theorem  ?

The Pythagorean theorem is a mathematical concept that describes the relationship between the sides of a right triangle. It states that in any right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.

In the given question,

We can use the Pythagorean theorem to solve this problem. The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse (the longest side) is equal to the sum of the squares of the lengths of the other two sides.

In this case, the tower, the guy wires, and the ground form a right triangle. Let's call the length of the guy wires "x". Then we can set up the following equation:

x² = 840² + (130)²

Simplifying and solving for x, we get:

x² = 705600 + 16900

x² = 722500

x = √722500

x = 850

Therefore, the guy wires are 850 feet long.

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The circle graph describes the distribution of preferred transportation methods from a sample of 400 randomly selected San Francisco residents.

circle graph titled San Francisco Residents' Transportation with five sections labeled walk 40 percent, bicycle 8 percent, streetcar 15 percent, bus 10 percent, and cable car 27 percent

Which of the following conclusions can we draw from the circle graph?

Together, Streetcar and Cable Car are the preferred transportation for 168 residents.
Together, Walk and Streetcar are the preferred transportation for 55 residents.
Bus is the preferred transportation for 45 residents.
Bicycle is the preferred transportation for 50 residents.

Answers

The conclusion we can draw graph is: Together, Streetcar and Cable Car are the preferred transportation for 168 residents.

What is graph?

In mathematics, a graph is a collection of points (called vertices or nodes) connected by lines (called edges). Graphs are used to represent many kinds of relationships, such as social networks, road networks, electrical circuits, and chemical structures.

According to given information:

We can draw the following conclusions from the circle graph:

Together, Streetcar and Cable Car are the preferred transportation for 27% + 15% = 42% of the residents. To find the number of residents in this group, we can multiply 42% by the total sample size of 400:

0.42 x 400 = 168 residents.

Therefore, the conclusion we can draw is: Together, Streetcar and Cable Car are the preferred transportation for 168 residents.

We cannot conclude that Walk and Streetcar are the preferred transportation for 55 residents, as there is no overlap between the sections representing these modes of transportation on the circle graph.

We cannot conclude that Bus is the preferred transportation for 45 residents, as the Bus section represents only 10% of the total sample size, which corresponds to 0.10 x 400 = 40 residents.

We cannot conclude that Bicycle is the preferred transportation for 50 residents, as the Bicycle section represents only 8% of the total sample size, which corresponds to 0.08 x 400 = 32 residents.

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Using trig to find a side.
Solve for x. Round to the nearest tenth, if necessary.

Answers

The side length x of the triangle to the nearest tenth is 170.3

What is the value of side length x?

The figures in the image are right-triangle.

From the diagram:

Angle θ = 20°

Opposite to angle θ = 62

Adjacent to angle θ = x

To find the value of x, we use the trigonometric ratio.

Note that: tangent = opposite / adjacent

Plug in the values

tan( 20 ) = 62 / x

Solve for x

x = 62 / tan( 20 )

x = 170.3

Therefore, the measure of side length labelled x is 170.3 units.

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an open box will be made by cutting a square from each corner of a 16-inches by 10-inches piece of cardboard and then folding up the sides. what size square should be cut from each corner in order to produce a box of maximum volume? what is that maximum volume?

Answers

The size of the square to cut is 5/3 inches and the maximum volume of the box is 266.67 cubic inches.

To find the size of the square to cut and the maximum volume, we can follow these steps:

Let's call the length of each side of the square to be cut x inches. So the dimensions of the base of the box would be (16-2x) inches by (10-2x) inches.

The height of the box would be x inches since we are folding up the sides.

The volume of the box can be found by multiplying the length, width, and height: V = (16-2x)(10-2x)x.

To find the maximum volume, we can take the derivative of V with respect to x and set it equal to zero, since the maximum volume occurs at a critical point.

After taking the derivative and simplifying it, we get the equation 24x^2 - 520x + 1600 = 0.

Solving this quadratic equation, we get x = 5/3 or x = 20/3. Since x must be less than 5 (the length of the shorter side), the only feasible solution is x = 5/3 inches.

Plugging this value of x back into the equation for the volume, we get V = (16-2(5/3))(10-2(5/3))(5/3) = 266.67 cubic inches.

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Find the three trigonometric ratios . If needed, reduce fractions.

Answers

In the given triangle the 3 trigonometric ratios are:

(A) Sinθ = 3/5, (B) Cosθ = 4/5, and (Tanθ = 3/4)

What are trigonometric ratios?

The trigonometric functions in mathematics are real functions that connect the right-angled triangle's angle to the ratios of its two side lengths.

They are extensively employed in all fields of geometry-related study, including geodesy, solid mechanics, celestial mechanics, and many others.

In general, arcsine, arccosine, tangent, cotangent, secant, and cosecant functions are used to express the inverses of sine, cosine, tangent, cotangent, secant, and cosecant functions.

So, according to t the given triangle, the 3 trigonometric ratios would be:

Sinθ = B/H

Sinθ = 27/45

Sinθ = 3/5

Cosθ = P/H

Cosθ = 36/45

Cosθ = 4/5

Tanθ = B/P

Tanθ = 27/36

Tanθ = 3/4

Therefore, in the given triangle the 3 trigonometric ratios are:

(A) Sinθ = 3/5, (B) Cosθ = 4/5, and (Tanθ = 3/4)

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under what conditions on a and b will the linear system have no solutions, one solution, infinitely many solutions?

Answers

The conditions will the linear equations have no solutions, one solution, infinitely many solutions are specified by variables and their coefficient matrix and states if the system is consistent or inconsistent.

Let us assume simple equations:

ax + by = c

ex + fy = g

Here a, b, c, e, f, and g are constants.

The different conditions are determined as:

1. No solutions: It is represented by D, If the determinant of the coefficient matrix is zero and the procedure is inconsistent, then we can assume that the system has no solutions.

2. One solution: If the coefficient matrix of any system is non-zero, then the system has one solution.

3. Infinitely many solutions: If the system is Consistent and the determinant of the coefficient matrix is zero, then the system has  Infinitely many solutions.

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some twins are sisters. all twins are siblings. therefore, some siblings are sisters. true or false

Answers

The statement "Some twins are sisters. All twins are siblings. Therefore, some siblings are sisters" is true.

 

Usually an illustration of a substantial deductive contention in which the conclusion takes coherently from the premises.

The primary introduction states that a few twins are sisters, which suggests that they are female twins. The moment preface states that all twins are kin, which implies that they are related by blood.

In this manner, on the off chance that a few twins are sisters and all twins are kin, it consistently takes after that a few kin are sisters.

It is imperative to note that the conclusion isn't essentially genuine for all kin, as a few kin may be brothers or mixed-gender twins. Be that as it may, the contention is still consistently substantial since the conclusion takes after coherently from the premises 

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100 POINTS IF CORRECT!!! NEED WORK

1. Let X be a binomial random variable with n = 20 and p =. 3.

А.

p)"-* , then

evaluate it using your calculator. (1 point)

B. Using probability notation, P(X = x), write out all the probabilities yould need to add

up in order to calculate P(X < 6), and then evaluate it using your calculator. (1 point)

c. For part B, why did you choose the upper bound that you did? If you were using the

normal approximation could you choose a different upper bound? Why or why not?

(1 point)

Answers

The probability for the binomial random variable X are,

Expression and value P(X = 6) is (²⁰C₆)(0.3)^6 (0.7)^20-6 and 0.1916.

Probability for P(X<6) is equal to 0.8084.

Upper bound for P(X<6) is P(X =5) and upper bound for normal approximation is one value less than the given value.

In the binomial random variable,

n = 20

p =0.3

(1 - p ) = 1 - 0.3

          = 0.7

Using the formula we have,

(ⁿCₓ)(p)^x (1-p)^n-x

For X= 6

Expression for P( X =6 ) is equal to,

(²⁰C₆)(0.3)^6 (0.7)^20-6

=  (38760) × 0.000729 × 0.00678223072

=0.1916

Probability of P(X<6)

= P(X=0) +  P(X=1)+ P(X=2)+ P(X=3)+ P(X=4)+ P(X=5)

= 1 - P(X =6 )

= 1 - 0.1916

=0.8084

Upper bound for above part is X= 5 as it is one less than 6.

Normal approximation could choose a different upper bound based on accuracy .

Choose the upper bound to be one less than the required value .

Therefore, the probability for the given binomial random variable is ,

P(X = 6) is (²⁰C₆)(0.3)^6 (0.7)^20-6 and value of P(X =6) = 0.1916

P(X<6) =0.8084.

Upper bound is P(X =5) when probability is P(X =6).

Yes ,we choose different upper bound normal approximation as upper bound is one less than the value.

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The above question is incomplete, the complete question is:

Let X be a binomial random variable with n = 20 and p = .3.

A. Write the expression for P(X = 6) in terms of the formula (n/x)(p)^x (1-p)^n-x , then evaluate it using your calculator.

B. Using probability notation, P(X = x), write out all the probabilities you'd need to add up in order to calculate P(X < 6), and then evaluate it using your calculator.

C. For part B, why did you choose the upper bound that you did? If you were using the normal approximation could you choose a different upper bound? Why or why not?

Given C(2, −8), D(−6, 4), E(0, 4), U(1, −4), V(−3, 2), and W(0, 2), and that △CDE is the preimage of △UVW, represent the transformation algebraically.

Answers

Rotate triangle △C'D'E' counterclockwise by approximately -0.785 radians about the origin:

[tex]x1' = 1 \times cos(-0.785) - (-4) \times sin(-0.785) \approx 0.436[/tex]

[tex]y1' = 1 \times sin(-0.785) + (-4) \times cos(-0.785) \approx -3.678[/tex]

[tex]x2' = -7 \times cos(-0.785) - 8[/tex]

What is the coordinate of the point?

The given point [tex]s C(2, -8), D(-6, 4),[/tex] and [tex]E(0, 4)[/tex] form the triangle △CDE, and the points U(1, -4), V(-3, 2), and W(0, 2) form the triangle △UVW, with △CDE being the preimage of △UVW.

To represent the transformation algebraically, we can use a combination of translations and rotations.

Translation:

To translate a point (x, y) by a vector (h, k), we add h to the x-coordinate and k to the y-coordinate of the point.

To transform triangle △CDE to triangle △UVW, we can first translate triangle △CDE by a vector (h, k) to obtain triangle △C'D'E', where C' = C + (h, k), D' = D + (h, k), and E' = E + (h, k).

Since the coordinates of C are (2, -8) and the coordinates of U are (1, -4), we can calculate the translation vector (h, k) as follows:

[tex]h = 1 - 2 = -1[/tex]

[tex]k = -4 - (-8) = 4[/tex]

So the translation vector is [tex](-1, 4).[/tex]

Rotation:

To rotate a point (x, y) by an angle θ counterclockwise about the origin, we use the following formulas:

[tex]x' = x \times \cos(\theta) - y times \sin(\theta)[/tex]

[tex]y' = x \times \sin(\theta) + y \times \cos(\theta)[/tex]

To transform triangle △C'D'E' to triangle △UVW, we can apply a rotation of angle θ counterclockwise about the origin to triangle △C'D'E', where C' = (x1', y1'), D' = (x2', y2'), and E' = (x3', y3'). Since the coordinates of C' are (2, -8) after translation, and the coordinates of U are (1, -4), we can calculate the rotation angle θ as follows:

[tex]\theta = atan2(y1' - y2', x1' - x2') - atan2(y1 - y2, x1 - x2)= atan2((-8 + 4) - (-4), (2 + 1) - (-6 + 3)) - atan2((-8) - (-4), 2 - (-6))[/tex]

Using a calculator, we can find θ to be approximately -0.785 radians.

So, the algebraic representation of the transformation that maps triangle [tex]\triangle CDE[/tex] to triangle [tex]\triangle UVW[/tex]  is:

Translate triangle △CDE by the vector (-1, 4) to obtain triangle △C'D'E':

[tex]C' = (2, -8) + (-1, 4) = (1, -4)[/tex]

[tex]D' = (-6, 4) + (-1, 4) = (-7, 8)[/tex]

[tex]E' = (0, 4) + (-1, 4) = (-1, 8)[/tex]

Therefore, Rotate triangle △C'D'E' counterclockwise by approximately -0.785 radians about the origin:

[tex]x1' = 1 \times cos(-0.785) - (-4) \times sin(-0.785) \approx 0.436[/tex]

[tex]y1' = 1 \times sin(-0.785) + (-4) \times cos(-0.785) \approx -3.678[/tex]

[tex]x2' = -7 \times cos(-0.785) - 8[/tex]

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a path in which you can only move to the right or up along edges of a grid (like the graph below) is called a monotonic lattice path. how many monotonic lattice path which do not pass above the diagonal are there for the graph below? (you can go through a vertex on the diagonal, but not above it.)

Answers

The total number of lattice points for the equation of the line y = -2x + 18 with given condition is equal to 10.

The equation of the line is y = -2x + 18.

To find the lattice points on this line,

find integer solutions for x and y that satisfy this equation.

Substituting y = -2x + 18 into the equation, we get,

-2x + 18 = y

We know that x and y are both non-negative integers,

so start by setting y = 0 and solving for x,

⇒-2x + 18 = 0

⇒-2x = -18

⇒x = 9

So one lattice point on the line is (9, 0).

Now ,substitute this value of x back into the equation to find the corresponding value of y,

y = -2(9) + 18

y = 0

So the lattice point is (9, 0).

Repeat this process by setting y = 1, 2, 3, and so on,

Until we find all the lattice points on the line.

For y = 1, we get,

⇒-2x + 18 = 1

⇒-2x = -17

⇒x = 8.5

But x must be a non-negative integer,

so there are no lattice points for y = 1.

For y = 2,

⇒-2x + 18 = 2

⇒-2x = -16

⇒x = 8

So the lattice point is (8, 2).

For y = 3,

⇒-2x + 18 = 3

⇒-2x = -15

⇒x = 7.5

Again, there are no lattice points for y = 3.

Continue this process until we have checked all possible values of y.

The lattice points on the line are,

(9, 0)

(8, 2)

(7, 4)

(6, 6)

(5, 8)

(4, 10)

(3, 12)

(2, 14)

(1, 16)

(0, 18)

Therefore, there are 10 lattice points on the line y = -2x + 18 that satisfy the conditions x ≥ 0 and y ≥ 0.

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The given question is incomplete, I answer the question in general according to my knowledge:

If x ≥ 0 and y ≥ 0 , how many lattice points does the line y = -2x + 18 pass through?

Jude is making cement for a driveway. The instructions show the amount of each ingredient to make 1 batch of cement. Complete each statement to adjust the ingredients for each new situation if Jude uses these instructions. 3 quarts of water. 4 packages of pre-mixed mortar.

Answers

To make 2 batches of cement, Jude will need 6 quarts of water and 8 packages of pre-mixed mortar.

To make 5 batches of cement, Jude will need 15 quarts of water and 20 packages of pre-mixed mortar.

What is proportion?

Ratio and fractions are the main bases on which proportion is explained. Two ratios are equal when they are expressed as a fraction in the form of a/b, ratio a:b, and then a proportion. In this case, a and b can be any two integers. The ratio and proportion are important building blocks for understanding the numerous ideas in science and mathematics.

To make 2 batches of cement, Jude will need 6 quarts of water and 8 packages of pre-mixed mortar.

To make 5 batches of cement, Jude will need 15 quarts of water and 20 packages of pre-mixed mortar.

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Fred is constructing a 95% confidence interval to estimate the average length (in minutes) of movies he watches. His random sample of 15 movies averaged 114 minutes long with a standard deviation of 11 minutes. What critical value and standard error of the mean should he use?

Answers

Fred should use a critical value of 2.145 and a standard error of the mean of 2.84 to construct a 95% confidence interval for the average length of movies he watches

To construct a confidence interval for the population mean length of movies watched by Fred, we can use the following formula

Confidence interval = sample mean +/- (critical value) x (standard error)

where the standard error of the mean (SE) is calculated as:

SE = sample standard deviation / sqrt(sample size)

Since Fred's sample size is 15 and he wants a 95% confidence interval, we need to find the critical value for a t-distribution with 14 degrees of freedom (n-1), which can be obtained from a t-distribution table or calculator.

Using a t-distribution calculator with 14 degrees of freedom and a 95% confidence level, we find the critical value to be 2.145.

Next, we can calculate the standard error of the mean as

SE = 11 / sqrt(15) = 2.84

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Solve the right triangle.
Round your answers to the nearest tenth.

Answers

Solving the right triangle, the measures are:

Ange A = 50°; side a ≈ 31.0; side c ≈ 40.4

How to Solve the Right Triangle?

A right triangle is a type of triangle that has one of its angles measuring 90 degrees (a right angle). The side opposite the right angle is called the hypotenuse, while the other two sides are called the legs.

To solve the right triangle, apply the Trigonometry ratios like the SOHCAHTOA.

Angle A = 180 - 90 - 40

Ange A = 50°

To find side a, apply the tangent ratio (TOA):

tan ∅ = opp./adj.

tan 40 = 26/a

a = 26/tan 40

a ≈ 31.0

To find c, apply the sine ratio (SOH):

sin 40 = 26/c

c = 26/sin 40

c ≈ 40.4

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URGENT PLEASE HELP !!

Answers

The total square inches of cardboard that option A will require is: 657 in²

The total square inches of cardboard that option B will require is: 844 in²

Option B is more cost effective

How to find the total surface area?

The total surface area of these three dimensional shapes are simply gotten by summing up the area of each individual face to get:

Option A:

Total surface area = 2(¹/₂(10 * 8.7)) + 3(19 * 10)

= 87 + 570

= 657 in²

Cost = 0.22 * 657 = $144.54

Option B:

Total surface area = 2(8 * 10) + 2(19 * 10) + 2(19 * 8)

= 160 + 380 + 304

= 844 in²

Cost = 0.18 * 844 = $151.92

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Find the area of this shapr

Answers

Answer:

42 m^2

Step-by-step explanation:

we find the area of ​​the rectangle with the formula WxL

7 x 4 = 28 m^2

we find the area of ​​the triangle with the formula 1/2 b x h

1/2 7 x 4 =

3.5 x 4 = 14 m^2

we add the two areas

28 + 14 = 42m^2   (your answer)

A metronoe uses an invented pendulum rod to control tempo. A weight can be slid up the pendulum rod to decrease tempo, or down the pendulum rod to increase tempo. A second fixed weight is hidden inside the mettronome at the base of the pendulum. The longer the distance between the two weights, the slower the tempo. The equation is used to calculate the frequency of the metronome pendulum: f=square of g/L / 2x f= frequency (number of back and forth cyles in 1 second) measured in hertz g=the acceleration due to gravity;9. 8m/s^2 L=length of the rod- in this case, the length of the rid between the two weights- measured in meters. Part 1 Each time the metronome's pendulum completes one back and forth cycle, it produces two ticks or beats. To calibrate the metronome for beats per minute (bpm), the manufacturer needs to know the length of the pendulum for various tempos. Solve f=square root of g/L /2x for L. Part 2 If f=1. 6 then there are 2 beats a second, or 192 beats per minute (bpm) What is the length of the rod between the two weights at that tempo? Use you equation from Part 1 to solve for L

Answers

The length of the pendulum rod (L) can be calculated using the formula L = g/(4π²f²) and the length of the rod between the two weights at a tempo of 192 bpm is approximately 0.101 meters.

Starting with the equation

f = √(g/L)/(2π)

Squaring both sides, we get

f² = g/L(4π²)

Rearranging, we get

L = g/(4π²f²) ------ (1)

Therefore, the length of the pendulum rod (L) can be calculated using the formula L = g/(4π²f²).

Given, f = 1.6 Hz, which means there are 2 beats per second or 120 beats per minute (bpm).

Using the formula in equation (1)

L = g/(4π²f²)

L = 9.8/(4π²(1.6)²)

L = 0.101 meters (rounded to three decimal places)

Therefore, the length of the rod between the two weights at a tempo of 192 bpm is approximately 0.101 meters.

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the choice between numerical integration approaches depends on what the data looks like and what computational expense you can tolerate. group of answer choices true false

Answers

The answer is True which means the choice between numerical integration approaches depends on what the data looks like and what computational expense you can tolerate.

The choice of numerical integration procedures is influenced by several criteria, including the nature of the data being integrated and the computing expenditure that may be accepted. If the function being integrated, for example, is smooth and well-behaved, a basic technique such as the trapezoidal rule or Simpson's rule may be adequate and computationally efficient.

If the function is extremely oscillatory or involves singularities, more complex approaches such as adaptive quadrature or Monte Carlo methods may be required to correctly integrate it. Furthermore, the size of the data collection and the processing resources available will influence the numerical integration method used.

Overall, choosing the best numerical integration strategy necessitates a careful evaluation of these numerous criteria to assure accuracy and efficiency in the integration of data.

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Helppp on this problem

Answers

The missing angles of the diagram are:

∠1 = 118°

∠2 = 62°

∠3 = 118°

∠4 = 30°

∠5 = 32°

∠6 = 118°

∠7 = 30°

∠8 = 118°

How to find the missing angles?

Supplementary angles are defined as two angles that sum up to 180 degrees. Thus:

∠1 + 62° = 180°

∠1 = 180 - 62

∠1 = 118°

Now, opposite angles are congruent and ∠2 is an opposite angle to 62°. Thus: ∠2 = 62°.

Similarly: ∠3 = 118° because it is congruent to ∠1

Alternate angles are congruent and ∠5 is an alternate angle to 32°. Thus:

∠5 = 32°

Sum of angle 4 and 5 is a corresponding angle to ∠2 . Thus:

∠4 + ∠5 = 62

∠4 + 32 = 62

∠4 = 30°

This is an alternate angle to ∠7 and as such ∠7 = 30°

Sum of angles on a straight line is 180 degrees and as such:

∠8 = 180 - (30 + 32)

∠8 = 118° = ∠6 because they are alternate angles

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in a shipment of 15 room air conditioners, there are 5 with defective thermostats. two air conditioners will be randomly selected (without replacement) and inspected. what is the probability that the selected two are both defective? round your answer to four decimal places.

Answers

The probability of both selected room air conditioners are defective is equal to 0.0952 rounded to four decimal places.

Total number of room air conditioners in shipment = 15

Number of defective room air conditioners = 5

The probability of the first air conditioner being defective is 5/15.

Since there are 5 defective air conditioners out of a total of 15.

After one air conditioner has been inspected,

There will be 4 defective air conditioners left out of a total of 14.

The probability of the second air conditioner also being defective, given that the first one was defective, is 4/14.

Probability of both air conditioners being defective.

Multiply probability of first air conditioner being defective by probability of second air conditioner being defective.

Given by first one was defective,

P(both defective) = (5/15) x (4/14)

Simplifying this expression ,

P(both defective) = 2/21

Therefore, the probability that the selected two air conditioners are both defective is 0.0952 rounded to four decimal places.

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Little Maggie is walking her dog, Lucy, at a local trail and the dog accidentally falls 150 feet down a ravine! You must calculate how much rope is needed for the repel line. Use the image below to find the length of this repel line using one of the 3 trigonometry ratios taught (sin, cos, tan). Round your answer to the nearest whole number. The repel line will be the diagonal distance from the top of the ravine to Lucy. The anchor and the repel line meet to form angle A which forms a 17° angle. Include all of the following in your work for full credit.
(a) Identify the correct trigonometric ratio to use (1 point)

(b) Correctly set up the trigonometric equation (1 point)

(c) Show all work solving equation and finding the correct length of repel line. (1 point)

Answers

(a) The correct trigonometric ratio to use is the tangent ratio (tan).

(b) The trigonometric equation is tan(17°) = Opposite/Adjacent.

(c) tan(17°) = Opposite/Adjacent

tan(17°) = 150/Adjacent

Adjacent = 150/tan(17°)

Adjacent = 150/0.3045

For questions 4-10, Circles C and M are shown. Lines PL and GK intersect at point Z. Line PL is tangent to circle C at point P and circle M at point L. Line GK is tangent to circle c at point G and circle M at point L. PZ = 10y - 3, ZL = 4x + 10, GZ = 7y + 21, ZK = 6x - 16.

4:Write an equation you can use to solve for x. 5: Solve the equation you wrote in question 4 for x.
6. Write an equation you can use to solve for y.
7: Solve the equation you wrote for 6 for y.
8: What is the length of GK?
9. What is the length of GZ?
10. What is the length of ZL?​

Answers

The two tangent theorem can be used to find the required equations and  the lengths of the of the segments and tangents as follows;

4. 6x - 16 = 4x - 10

5. x = 13

6. 10y - 3 = 7y + 21

7. y = 8

8. GK = 139
9. GZ = 77

10. ZL = 62

What is the two tangent theorem?

The two tangent theorem states that intersecting tangent segments from the point of the intersection to the circle are congruent.

The two tangent theorem indicates;

PZ = GZ, and ZK = ZL

Therefore;

4. An equation that can be used to solve for x can be obtained from the equation formed using the two tangent theorem and plugging in the value of ZK and ZL in the equation; ZK = ZL

The equation is therefore; 6·x - 16 = 4·x + 10

5. 6·x - 16 = 4·x + 10

6·x - 4·x = 10 + 16 = 26

2·x = 26

x = 13

6. The equation that can be used to solve for y can be obtained from the equation PZ = GZ, by plugging in the values of PZ and GZ in the equation as follows;

10·y - 3 = 7·y + 21

7. 10·y - 3 = 7·y + 21

10·y - 7·y = 21 + 3 = 24

3·y = 24

y = 24/3 = 8

y = 8

8. GK = GZ + ZK

Therefore; GK = 7·y + 21 + 6·x - 16

GK = 7 × 8 + 21 + 6 × 13 - 16 = 139

GK = 139

9. GZ = 7·y + 21 = 7 × 8 + 21 = 77

GZ = 77

10. ZL = 4·x + 10

Therefore; ZL = 4 × 13 + 10 = 62

ZL = 62

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I don’t see answer
Pleas tell answer thanks

Answers

you have to tell the question first

pls helpppp with this

Answers

Answer:

[tex]y = 2x - 1[/tex]

Step-by-step explanation:

We can represent this line in an equation in slope-intercept form:

[tex]y = mx + b[/tex],

where [tex]m[/tex] is the line's slope (rise over run), and [tex]b[/tex] is the y-coordinate of its y-intercept.

First, we can solve for the line's slope:

slope = rise / run = 2/1 = 2

Next, we can identify the y-coordinate of the y-intercept by looking at the vertical axis' value when the red line crosses it:

-1

Finally, we can put these two pieces of information together to form an equation in slope-intercept form:

[tex]\boxed{y = 2x - 1}[/tex]

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