Can someone help me asap? It’s due today!! I will give brainliest if it’s correct

Please show work

Answer:

{(12, 3), (11, 2), (10, 1), (9, 0), (8, 1), (7, 2), (6, 3)}

Step-by-step explanation:

In a function, all x-coordinates must be different.

{(7, 2), (100, 10), (13, –7), (7, 9), (10, 100), (4, –2), (5, 5)}

7 appears twice as an x-coordinate. Not a function.

{(1000, 10), (1000, 12), (1000, 16), (100, 5), (100, 7), (78, 3), (90, 5)}

1000 appears 3 times as an x-coordinate. Not a function.

{(6, 3), (5, 2), (4, 1), (3, 0), (4, –1), (5 ,–2), (6 ,–3)}

4 appears twice as an x-coordinate. Not a function.

{(12, 3), (11, 2), (10, 1), (9, 0), (8, 1), (7, 2), (6, 3)}

All x-coordinates are different. Function.

To test the null hypothesis that the variance of the first group is twice as big as that of the second group in two independent normal random samples, you can use the F-test. The null hypothesis (H0) would be stated as follows:

[tex]H0: σ1^2 = 2 * σ2^2[/tex]

To conduct the F-test, calculate the F-statistic using the sample variances (s1^2 and s2^2) from both groups:

F = s1^2 / (2 * s2^2)

Next, compare the calculated F-statistic to the critical F-value found in the F-distribution table at a chosen significance level (typically α = 0.05) and degrees of freedom for both groups (n1-1 and n2-1).

If the F-statistic is greater than the critical F-value, you would reject the null hypothesis, concluding that there is significant evidence that the variance of the first group is not twice as big as that of the second group. If the F-statistic is less than or equal to the critical F-value, you would fail to reject the null hypothesis, indicating that there isn't enough evidence to conclude that the variances are different as stated.

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Answer:

4th option

Step-by-step explanation:

to find the surface you need to find the area of the base square first.

7 in × 7 in = 49 in^2

then find the triangular sides

9 in × 7 in × 1/2 =31.5 in^2

31.5 in^2 × 4 = 126 in^2

so 126in^2 +49in^2 = 175in^2

The amount for each category is given as:

Initially, we must determine how much of each crop is present:

By now, we are able to construct the circle graph by knowing that a circle comprises of 360 degrees, assorted degrees can aid us in identifying every classification of crops:

To find out the amount for each category, we need to compute each percentage share:

Given this information, we can proceed and develop the circle graph.

Make use of a clean and circular diagram and divide it into three proportional parts using their corresponding degree values, then label every section with its matching crop name alongside the respective percentage owned.

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The farmer has the following distribution of crops:

Corn - 40%

Wheat - 35%

Cotton - 25%

A farmer uses his land to grow soybeans, corn, wheat, and cotton. He has a total of 500 crops consisting of corn, wheat, and cotton. The distribution of these crops is 40% corn, 35% wheat, and 25% cotton. Sketch a circle graph and label it with percentages.

let's firstly convert the mixed fractions to improper fractions, then subtract.

[tex]\stackrel{mixed}{9\frac{6}{7}}\implies \cfrac{9\cdot 7+6}{7}\implies \stackrel{improper}{\cfrac{69}{7}}~\hfill \stackrel{mixed}{2\frac{3}{7}} \implies \cfrac{2\cdot 7+3}{7} \implies \stackrel{improper}{\cfrac{17}{7}} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{69}{7}~~ - ~~\cfrac{17}{7}\implies \cfrac{69-17}{7}\implies \cfrac{52}{7}\implies 7\frac{3}{7}[/tex]

This sequence does not converge because it does not approach a single value as n goes to infinity. The sequence appears to oscillate between certain values, specifically {1/5, 1/2, 1/6, 1/3, 1/7, 1/4, 1/8, 1/5,...}.

Therefore, the limit does not exist (DNE).
The given sequence is {1/5, 1/2, 1/6, 1/3, 1/7, 1/4, 1/8, 1/5,...}. To determine whether this sequence converges or diverges, let's find a pattern:

The numerators are always 1. To find the pattern in the denominators, we can examine their differences: (5-2), (6-2), (7-3), (8-4), and so on. We observe that the differences are increasing by 1 each time: 3, 4, 4, 4,...

Now let's write down the denominators based on this pattern: 5, 2, 6, 3, 7, 4, 8, 5,... . The denominators repeat after every four terms, which means the sequence is periodic with a period of 4.

A periodic sequence does not have a unique limit because the terms keep oscillating between different values. Therefore, this sequence diverges, and the answer is DNE (does not exist).

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The weight of one green triangle is equal to: D. -2.

In this scenario and exercise, you are required to write a system of equations that represents the balance by using the balance shown in the image attached below and then determine the weight of one green triangle.

Since it is a balance, we can reasonably infer and logically deduce that all of the pink squares (s) and green triangles (t) on the left-hand side must be equal to the all of the parameters (numerical values) on the right-hand side of the balance as follows;

3s + 2t = 5    ......equation 1

2s + 5t = -4    ......equation 2

By solving the system of equations simultaneously using the elimination method and multiplying equation 2 by 3/2, we have:

3s + 2t = 5

3s + 7.5t = -6

(3s - 3s) + (2t - 7.5t) = (5 + 6)

-5.5t = 11

t = -11/5.5

t = -2.

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Missing information:

The question is incomplete and the complete question is shown in the attached picture.

Answer:

243π

Step-by-step explanation:

Area of the entire circle = πr² = π18² = 324π

Area of sector = (90/360)π(18)² = 81π

Shaded area = 324π - 81π = 243π

Therefore, the correct option is (b) 46 that is the number of students who like Twix and Reese's peanut butter cups only (region D) by principle of inclusion-exclusion, we need to subtract the number of students who like Snickers, as well as the number of students who like all three kinds of candy, from the number of students who like Twix and Reese's peanut butter cups along with one or both of the other kinds of candy.

We can start by using the principle of inclusion-exclusion, which tells us that:

|A ∪ B ∪ C| = |A| + |B| + |C| - |A ∩ B| - |A ∩ C| - |B ∩ C| + |A ∩ B ∩ C|

where |X| denotes the number of elements in set X.

Using the numbers given in the problem, we have:

|A| = 129

|B| = 118

|C| = 145

|A ∩ B| = 22

|B ∩ C| = 54

|A ∩ C| = 55

|A ∩ B ∩ C| = 8

Substituting these values into the formula, we get:

|A ∪ B ∪ C| = 129 + 118 + 145 - 22 - 55 - 54 + 8 = 269

This tells us that 269 students like at least one of the three kinds of chocolate candy.

To find the number of students who like Twix and Reese's peanut butter cups only (region D), we need to subtract the number of students who like Snickers, as well as the number of students who like all three kinds of candy, from the number of students who like Twix and Reese's peanut butter cups along with one or both of the other kinds of candy:

|D| = |B ∩ C| - |A ∩ B ∩ C|

= 54 - 8

= 46

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Answer:

3 months

Step-by-step explanation:

To find the amount of months, m, we will have to solve the equation given. If you don't have any experience solving equations, this could be tricky, but hopefully my work below will be helpful.

15m + 35 = 10(m + 5)

15m + 35 = 10m + 50

15m - 10m + 35 = 10m - 10m + 50

5m + 35 = 50

5m + 35 - 35 = 50 - 35

5m = 15

5m/5 = 15/5

m = 3

After 3 months the cost of the gyms will be the same. Let me know if you need more clarification or were confused by my work. :)

A significant deviation from the expected value of 425 grams for the bag filling machine. The manufacturer should investigate and adjust the machine to ensure that it is distributing the correct amount of chocolate chips in each bag.

Based on the information provided, the manufacturer of chocolate chips is interested in determining if there is a deviation from the expected value of 425 grams for the bag filling machine. They have collected a sample of 18 bags and calculated a mean of 416 grams with a standard deviation of 19. Assuming a normal distribution, they would like to determine the p-value of the test statistic with a significance level of 0.01.

To do this, they would conduct a one-sample t-test using the formula:

t = (x - μ) / (s / √n)

where x is the sample mean, μ is the population mean (expected value), s is the sample standard deviation, and n is the sample size.

Plugging in the values, we get:

t = (416 - 425) / (19 / √18) = -2.21

Using a t-distribution table or calculator with 17 degrees of freedom (n-1), we can find the p-value associated with a t-score of -2.21 and a one-tailed test (since we are interested in whether the bags are underfilled). The p-value is approximately 0.0212, which is less than the significance level of 0.01. Therefore, we reject the null hypothesis and conclude that the bags are likely being underfilled by the bag filling machine at the 425-gram setting.

In summary, the p-value of the test statistic is approximately 0.0212, indicating a significant deviation from the expected value of 425 grams for the bag filling machine. The manufacturer should investigate and adjust the machine to ensure that it is distributing the correct amount of chocolate chips in each bag.

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A significant deviation from the expected value of 425 grams for the bag filling machine. The manufacturer should investigate and adjust the machine to ensure that it is distributing the correct amount of chocolate chips in each bag.

Based on the information provided, the manufacturer of chocolate chips is interested in determining if there is a deviation from the expected value of 425 grams for the bag filling machine. They have collected a sample of 18 bags and calculated a mean of 416 grams with a standard deviation of 19. Assuming a normal distribution, they would like to determine the p-value of the test statistic with a significance level of 0.01.

To do this, they would conduct a one-sample t-test using the formula:

t = (x - μ) / (s / √n)

where x is the sample mean, μ is the population mean (expected value), s is the sample standard deviation, and n is the sample size.

Plugging in the values, we get:

t = (416 - 425) / (19 / √18) = -2.21

Using a t-distribution table or calculator with 17 degrees of freedom (n-1), we can find the p-value associated with a t-score of -2.21 and a one-tailed test (since we are interested in whether the bags are underfilled). The p-value is approximately 0.0212, which is less than the significance level of 0.01. Therefore, we reject the null hypothesis and conclude that the bags are likely being underfilled by the bag filling machine at the 425-gram setting.

In summary, the p-value of the test statistic is approximately 0.0212, indicating a significant deviation from the expected value of 425 grams for the bag filling machine. The manufacturer should investigate and adjust the machine to ensure that it is distributing the correct amount of chocolate chips in each bag.

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To make wheels of a diameter of 67.5 mm and a width of 29.3 mm, Alfie requires 104891.38 cubic mm volume of plastic.

A cylinder is a 3-Dimensional shape with 3 faces that are one curved face and 2 flat ends. The volume of a cylinder is given by the expression:

V = π[tex]r^2h[/tex]

r is the radius

h is the height

Given, diameter = 67.5 mm

radius = d ÷ 2 = 67.5 ÷ 2

= 33.75 mm

height = width = 29.3 mm

Volume = [tex]\frac{22}{7}*33.75*33.75*29.3[/tex]

= 104891.38 cubic mm

Therefore, the volume of the cylindrical wheel that Alfie designed is 104891.38 cubic mm.

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The radical expression is simplified to 7√10. Option D

A radical expression can simply be described as an expression that is made up of or consists of a radical.

A radical is made up of a square root sign that is used to represent surd forms.

It is also important to note that surds are described as values that can no longer be simplified

From the information given, we have the radical expression as;

√490

Find the pair factors of 490 that has on perfect square.

We get;

√49 × 10

Find the square root of the values, we have;

7× √10

Multiply the values

7√10

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The person will need approximately 0.55 gallons of paint to paint the room.

To calculate the amount of paint needed, we need to first calculate the surface area that will be painted. The person will paint four walls and the ceiling of the room.

To calculate the surface area of the walls, we need to find the area of each wall and add them together. Since the room is rectangular, each wall has the same height of 8 ft. The width and length of each wall are:

- Wall 1: 9 ft x 8 ft = 72 ft²
- Wall 2: 9 ft x 8 ft = 72 ft²
- Wall 3: 2 ft x 8 ft = 16 ft²
- Wall 4: 2 ft x 8 ft = 16 ft²

The total surface area of the walls is: 72 ft² + 72 ft² + 16 ft² + 16 ft² = 176 ft²

To calculate the surface area of the ceiling, we need to find the area of the rectangle that represents the ceiling. The length and width of the ceiling are:

- Ceiling: 9 ft x 2 ft = 18 ft²

Therefore, the total surface area that will be painted is: 176 ft² + 18 ft² = 194 ft²

Since we know the surface area that will be painted, we can now calculate the amount of paint needed. The amount of paint needed depends on the type of paint and the manufacturer's instructions. Generally, paint coverage is measured in square feet per gallon. If we assume a coverage of 350 square feet per gallon, then the person will need:

- 194 ft² / 350 ft²/gal = 0.55 gallons of paint

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The true statements about the populations and land areas are:

The population density of an area is obtained by dividing the population of the city or village by the area or land mass. Population density is defined as the population per unit of land area.

Based on the available information, we can say that the population density of city B is obtained with the ratios of population and density. Also, the calculation of the population densities will show that City B is greater than City C.

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We can start by finding Jerry's pay rate per second:

Pay rate per second = $10,000 / 114 seconds = $87.72 per second

Then, we can calculate Jerry's earnings for 30 minutes (1800 seconds):

Earnings for 30 minutes = $87.72 per second x 1800 seconds = $157,896

Therefore, Jerry will make $157,896 in 30 minutes based on his pay rate of $10,000 in 114 seconds.

The expression using the greatest common factor is 6x²(x⁸ - 16).

The complete factored form of the expression is 6x²(x⁴ + 4)(x² + 2)(x² - 2).

The greatest common factor of function 6x¹⁰ - 96x², is 6x².

6x¹⁰ - 96x² = 6x²(x⁸ - 16)

The complete factorization of the expression is calculated as follows;

expand the function x⁸ - 16;

x⁸ - 16 = (x⁴ + 4)(x⁴ - 4)

We can also simplify the function x⁴ - 4 further as shown below;

x⁴ - 4 = (x² + 2)(x² - 2)

The complete factored form of the function 6x¹⁰ - 96x² is calculated as;

6x¹⁰ - 96x²  = 6x²(x⁴ + 4)(x² + 2)(x² - 2)

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To compare the quantitative responses to the two conditions in a paired design, the differences between the response within each pair are used. These paired differences can be compared to the appropriate statistical procedures to determine the significance of the results.

For paired designs, the appropriate statistical procedure is the one-sample t procedure. This procedure is used to compare the mean of the paired differences to a hypothesized value, such as zero. The null hypothesis is that the mean difference is equal to zero, indicating no significant difference between the two conditions. If the calculated t-value is greater than the critical value, the null hypothesis can be rejected, indicating a significant difference between the two conditions.

In cases where the sample size is large and the population standard deviation is known, the two-sample z procedure can also be used. This procedure compares the difference between the means of the two samples to a hypothesized value. However, this procedure is less commonly used for paired designs.

The two-sample t procedure is used for independent designs, where two samples are selected from different populations. This procedure compares the means of the two samples to each other, rather than comparing the paired differences within each sample.

In summary, for paired designs, the appropriate statistical procedure is the one-sample t procedure, while the two-sample z procedures and the two-sample t procedures are used for independent designs.

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Answer:

For the given information, let's solve the following:

a. Do you know that the period of a function is the time taken for one complete cycle of the function? In this case, the Ferris wheel takes one rotation every 80 seconds, which means it completes one cycle in 80 seconds. Therefore, the period of the function is 80 seconds.

b. To write f(t) in the form of f(t) = a sin b(t-h) + k, we first need to determine the amplitude, period, and phase shift of the function. The amplitude is half the distance between the highest and lowest points of the function, which is (102-94)/2 = 4 feet. The period is 80 seconds, which we found in part a. The phase shift is 0 since the ride starts at the highest point. Therefore, the function can be written as f(t) = 4 sin (2π/80)t + 102.

c. To graph the function, we can plot the height of the car (y-axis) against time (x-axis), using the function obtained in part b.

d. To find the value of f(15), we simply substitute t = 15 in the function obtained in part b. f(15) = 4 sin (2π/80)(15) + 102 = 98.28 feet. This makes sense because after 15 seconds, the car would have traveled a quarter of a cycle and would be descending from the highest point.

e. To find f(180), we can use the fact that the Ferris wheel takes one rotation every 80 seconds. Therefore, after 180 seconds, the wheel would have completed two full cycles and would be back at the highest point. Therefore, f(180) = 102 feet.

I hope this helps! Let me know if you have any further questions or if there's anything else I can assist you with.

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Answer:

To create the cylindrical travel case, we need approximately 588.75 square inches of leather.

The student government should survey 640 students to estimate the percentage of the student body that supports the proposed change in the academic calendar with a 99% confidence level and a margin of error of 8%.

To determine the sample size needed for the survey, we can use the following formula:
n = (z^2 * p * q) / E^2
Where:
n = sample size
z = z-score for the desired confidence level (99%)
p = estimated proportion of the population supporting the change (unknown, so we'll use 0.5 for a conservative estimate)
q = 1 - p
E = margin of error (0.08)
Plugging in the values, we get:
n = (2.576^2 * 0.5 * 0.5) / 0.08^2
n = 639.53
Since we can't have a fractional number of students, we should round up to the nearest integer:
n = 640

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Consider three random variables, U, V, and W. The answer is E(W) = 2.

To solve for E(W), we need to use the fact that U is equal to both 3V+2 and 5W-23. We can set these two expressions equal to each other:

3V + 2 = 5W - 23

Solving for V in terms of W, we get:

V = (5W - 25) / 3

Now we can use the formula for the expected value of a linear function of a random variable:

E(aX + b) = aE(X) + b

In this case, we have:

V = (5W - 25) / 3

So:

E(V) = E((5W - 25) / 3) = (5/3)E(W) - 25/3

We know that E(V) = -5, so we can substitute that in:

-5 = (5/3)E(W) - 25/3

Solving for E(W), we get:

E(W) = (-5 + 25/3) / (5/3) = 2

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It will take approximately 14.4 years for $2,700 to grow to $15,000 at a 6% compound interest rate, compounded semiannually.

A equals the projected value, in this case $15,000.

P is equal to the current value, in this case $2,700.

r = 6%, or 0.06 in decimal form, is the yearly interest rate.

The number n represents the number of times the interest is compounded yearly (because it is compounded twice annually).

t = the duration in years

Using the values we hold in place of:

15000 = 2700(1 + 0.06/2)^(2t)

by 2700, divide both sides.

15000/2700 = (1 + 0.06/2)^(2t)

Simplify:

5.56 = (1.03)^(2t)

Consider both sides' natural logarithms:

ln(5.56) = ln(1.03)^(2t)

Using the logarithm property, ln(ab) = b ln(a),

ln(5.56) = 2t ln(1.03)

Subtract the two sides by 2 ln(1.03):

t = ln(5.56) / (2 ln(1.03))

t ≈ 14.4

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a. Therefore, the value of X, xo, that satisfies P(41 ≤ X ≤ xo) = 0.8630 is xo = 8.15. We can illustrate this on a graph of the standard normal distribution by shading the area between the z-scores of 0 and 1.05. b. Therefore, the 10th percentile is x10 = 1.16. We can illustrate this on a graph of the standard normal distribution by shading the area to the left of the z-score of -1.28.

a. Using the standard normal probability table, we find that the z-score associated with a probability of 0.8630 is 1.05. Therefore, we can use the formula z = (X - μ) / σ to solve for X:
1.05 = (xo - 5) / 3
Multiplying both sides by 3, we get:
xo - 5 = 3.15
Adding 5 to both sides, we get:
xo = 8.15
b. To calculate the 10th percentile, we need to find the value of X, call it x10, which corresponds to a cumulative probability of 0.1. Using the standard normal probability table, we find that the z-score associated with a cumulative probability of 0.1 is -1.28. Therefore, we can use the formula z = (X - μ) / σ to solve for X:
-1.28 = (x10 - 5) / 3
Multiplying both sides by 3, we get:
x10 - 5 = -3.84
Adding 5 to both sides, we get:
x10 = 1.16

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The complete oxidation of linoleic acid (C18H32O2) produces 16 reducing equivalents.

To determine the number of reducing equivalents produced by the complete oxidation of linoleic acid (C18H32O2), we need to follow these steps:

1. Determine the number of hydrogen atoms in linoleic acid: Linoleic acid has the molecular formula C18H32O2, which contains 32 hydrogen atoms.    
     
2. Divide the number of hydrogen atoms by 2: Since 1 mole of electrons is donated by 1 reducing equivalent, and each pair of hydrogen atoms (H2) contributes 2 moles of electrons, we need to divide the number of hydrogen atoms by 2 to find the number of reducing equivalents.

32 hydrogen atoms ÷ 2 = 16 reducing equivalents

So, the complete oxidation of linoleic acid (C18H32O2) produces 16 reducing equivalents.

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there are 4 kind of marble

6 possibilities of different chosing

6+4 = 10

The solution is, : y = 1/3x+6, is the equation of a line that is perpendicular to the line y= -3x+2 and passes through the point (6,8).

We know that,

y = -3x+2 is in slope intercept form  y = mx+b  where m is the slope and b is the y intercept

The slope is -3

Perpendicular lines have slopes that are negative reciprocals

The slope of the perpendicular line is  -1/-3 = 1/3

The equation of the new line is

y = 1/3x +b

Using the point that passes through the line ( 6,8) and substituting in for x and y

8 = 1/3(6) +b

8 = 2+b

8-2 =b

6 =b

The equation becomes

y = 1/3x+6.

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The value of sin A to the nearest hundredth is,

⇒ sin A = 0.86

We have to given that;

Triangle ABC shown in figure, with sides of lengths,

AB = 11

BC = 9.5

CA = 6

Hence, We get;

sin A = BC / AB

sin A = 9.5 / 11

sin A = 0.86

Thus, The value of sin A to the nearest hundredth is,

⇒ sin A = 0.86

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