An instructor has graded 19 exam papers submitted by students in a class of 20 students, and the average so far is 70. (The maximum possible score is 100.) How high would the score on the last paper have to be to raise the class average by 1 point? By 2 points?

The solution is, the measure of angle 7 is, ∠7 = 145°.

Here, we have,

∠4 and ∠8 are corresponding angles

∠8 and ∠7 are supplementary angles

so, we get,

Then, ∠4 and ∠7 are supplementary angles.

This means that

∠4 + ∠7 = 180°

we, have,

35° + ∠7 = 180°

so, we get,

∠7 = 180° - 35°

or, ∠7 = 145°

Hence, The solution is, the measure of angle 7 is, ∠7 = 145°.

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complete question:

Oak Street and Elm Street run parallel to each other. When Main Street interest them, it forms interior angle 4, and measuring 35 degrees. What is the measure of angle 7 ?

Answer: 9/8 is the slope

False. A truth table for p V ~q requires only two possible combinations of truth values.

False. A truth table for p V ~q requires a total of two possible combinations of truth values.

The statement "p V ~q" is a logical disjunction, meaning it is true if either p is true or ~q is true (or both). There are only two possible truth values for each of these propositions: true or false. Therefore, there are only two possible combinations of truth values for the statement "p V ~q," which are:

- p is true, ~q is false (i.e., q is true)
- p is true, ~q is true (i.e., q is false)

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Using the given ratio we can see that there are 19 used cars.

We know that the dealership reported that they have 5 new cars for every 1 used car on the lot, so we need to use that ratio.

5/6 of the cars are new.

1/6 of the cars are used.

The total number is 114, then the number of used cars is:

(1/6)*114 = 19

There are 19 used cars.

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The answer to the mathematical expression of Cos (90°-0) / sin (180°- 0) - sin^2 (-0) is:

= -1

To calculate the expression, we can begin by determining the values and subtracting or dividing as is the case. First, we begin by determining the values as follows:

Cos 90° = 0

Cos 0 = 1

Sin 180° = 0

Sin -0 = 0

Now we express the values as follows:

Cos (90°-0) / sin (180°- 0) - sin^2 (-0)

0 - 1/0 - 0

= -1

So, the answer obtained from resolving this expression is -1.

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The sample proportion of rainbow lollipops in the festival promoter's sample is 0.33 (27/82), rounded to two decimal places. The population proportion of rainbow lollipops among all products offered at the stop of the tour is 0.32 (17/53), rounded to two decimal places.

The sample proportion and population proportion of rainbow lollipops in the given situation.

For the entire population (all products offered) at the stop, there were 17 rainbow lollipops out of every 53 products offered. To find the population proportion (P), we can use the formula:

P = Number of Rainbow Lollipops / Total Number of Products
P = 17 / 53

Now let's calculate the population proportion:
P ≈ 0.32 (rounded to two decimal places)

For the festival promoter's sample, he found that 27 of the 82 products offered were rainbow lollipops. To find the sample proportion (p'), we can use the formula:

p' = Number of Rainbow Lollipops in Sample / Total Number of Products in Sample
p' = 27 / 82

Now let's calculate the sample proportion:
p' ≈ 0.33 (rounded to two decimal places)

So, in proper notation, the population proportion (P) is approximately 0.32, and the sample proportion (p') is approximately 0.33.

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The measure of angle D in is 19° which is option (A)

To measure D, recall that sum of the angles in a triangle is 180°. We have two angles in triangle BCD, so we can find the third angle as follows:

m∠BCD + m∠CBD + m∠DCB = 180°

46° + m∠CBD + 90° = 180° (since angle DCB is a right angle)

m∠CBD = 44°

Now, we can use the fact that the sum of the angles in triangle CDE is 180° to find the measure of angle D:

m∠CDE + m∠DCE + m∠ECD = 180°

m∠CDE + 71° + 90° = 180° (since angle ECD is a right angle)

m∠CDE = 19°

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A) A point C such that the distance from the origin can be plotted at (1, 0).

B) A point E which is at 4/5 closer to the origin than C can be plotted at (4/5, 0) = (0.8, 0)

A) Given a point O(0, 0).

A distance of 1 from the origin can be marked at 4 points :

(1, 0), (-1, 0), (0, 1) and (0, -1).

Using the distance formula, all the points from O is 1.

Let's take C as (1, 0).

B) Point E is at 4/5 closer to O than C.

Ratio of the distance between OE and EC is 4/5 : 1/5 = 4 : 1.

The section formula states that If a line with end points (x, y) and (x', y') is divided in the ratio m : n, then the divided point is,

P = [(mx' + nx)/(m + n) , (my' + ny)/ (m + n)]

Here (x, y) = (0, 0) and (x', y') = (1, 0)

m : n = 4 : 1

Using the section formula,

Coordinates of E = ((4 + 0)/ 5 , (0 + 0)/5) = (4/5, 0) = (0.8, 0).

If the distance between (0, 0) and (1, 0) is divided in to 5 segments, then the point E will be at 4th segment.

Hence the required coordinates are C(1, 0) and E(0.8, 0).

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The cost of 4 burgers and 6 hot dogs is $25.

We are given that;

Expression= 3.25+2ℎ

Number of burgers=444

Number of hot dogs= 666

Now,

To find the cost of 4 burgers and 6 hot dogs, we need to substitute b = 4 and h = 6 in the expression 3.25b+2h. We get:

3.25(4)+2(6)

Using the order of operations, we first multiply 3.25 by 4 and 2 by 6. We get:

13+12

Then we add 13 and 12. We get:

25

Therefore, by the given expression the answer will be $25.

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The best estimate for the dolphin population in the region is 600 dolphins.

Estimated Population Size = (Number of dolphins captured) × (Number of dolphins recaptured) / (Number of marked dolphins recaptured)

In this case, the equation would be:

Estimated Population Size = (60) × (330) / (33)

This equation simplifies to:

Estimated Population Size = 600

Therefore, the best estimate for the dolphin population in the region is 600 dolphins.

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1. The set of sophomores at your school who are not taking discrete mathematics: A ∩ Bᶜ.
2. The set of sophomores taking discrete mathematics in your school: A ∩ B.
3. The set of students at your school who either are sophomores or are taking discrete mathematics: A ∪ B.
4. The set of students at your school who either are not sophomores or are not taking discrete mathematics: Aᶜ ∪ Bᶜ.

1. The set of sophomores at your school who are not taking discrete mathematics can be represented symbolically as A - B. This means that we take all the elements in set A (sophomores) and subtract the elements in set B (students taking discrete mathematics) from it, which gives us the set of sophomores who are not taking discrete mathematics.

2. The set of sophomores taking discrete mathematics in your school can be represented symbolically as A ∩ B. This means that we take the intersection of sets A and B, which gives us the set of students who belong to both sets A and B. In this case, it gives us the set of sophomores taking discrete mathematics.

3. The set of students at your school who either are sophomores or are taking discrete mathematics can be represented symbolically as A ∪ B. This means that we take the union of sets A and B, which gives us the set of all students who belong to either set A or set B (or both). In this case, it gives us the set of all sophomores and all students taking discrete mathematics.

4. The set of students at your school who either are not sophomores or are not taking discrete mathematics can be represented symbolically as U - (A ∩ B). This means that we take the complement of the intersection of sets A and B from the universal set U. In other words, we take all the elements in the universal set U and subtract the elements that belong to both sets A and B, which gives us the set of all students who either are not sophomores or are not taking discrete mathematics.

1. The set of sophomores at your school who are not taking discrete mathematics: A ∩ Bᶜ. This represents the intersection of set A (sophomores) and the complement of set B (students not in discrete mathematics).

2. The set of sophomores taking discrete mathematics in your school: A ∩ B. This represents the intersection of set A (sophomores) and set B (students in discrete mathematics).

3. The set of students at your school who either are sophomores or are taking discrete mathematics: A ∪ B. This represents the union of set A (sophomores) and set B (students in discrete mathematics).

4. The set of students at your school who either are not sophomores or are not taking discrete mathematics: Aᶜ ∪ Bᶜ. This represents the union of the complement of set A (students not in the sophomore class) and the complement of set B (students not in discrete mathematics).

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The Net Pay for the year for gross annual pay is $19 163. Employment insurance premiums are deducted at a rate of 2 with income taxes at a rate of 17% on all amounts over $8131 is $16,137.03.

To find the net pay for the year, we need to subtract the deductions from the gross pay and then subtract the income tax from the remaining amount.

First, we need to find the total amount deducted for EI and CPP premiums:

EI premium = 2.25% of $19,163 = $431.67

CPP premium = 3.75% of $19,163 = $720.86

Total deductions = $431.67 + $720.86 = $1,152.53

Next, we need to find the taxable income by subtracting the basic personal amount from the gross pay:

Taxable income = $19,163 - $8,131 = $11,032

Then, we need to calculate the income tax on the taxable income:

Income tax = 17% of ($11,032) = $1,873.44

Finally, we can calculate the net pay by subtracting the total deductions and income tax from the gross pay:

Net pay = $19,163 - $1,152.53 - $1,873.44 = $16,137.03

Therefore, the net pay for the year is $16,137.03.

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8 square unit to find the area of the parallelogram with vertices A(-4, 2), B(-2, 5), C(2, 3), and D(0, 0), follow these steps:

Step 1: Find the base and height vectors of the parallelogram. Let's use AB and AD as the base and height vectors, respectively.
AB = B - A = (-2 - (-4), 5 - 2) = (2, 3)
AD = D - A = (0 - (-4), 0 - 2) = (4, -2)

Step 2: Calculate the cross-product of the base and height vectors.
Cross product = AB_x * AD_y - AB_y * AD_x = (2 * -2) - (3 * 4) = -4 - 12 = -16

Step 3: Find the area by taking the absolute value of the cross product divided by 2.
Area = |Cross product| / 2 = |-16| / 2 = 8

The area of the parallelogram with vertices A(-4, 2), B(-2, 5), C(2, 3), and D(0, 0) is 8 square units.

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The relationship of the angles is ∠P = 1/2(ACB - AB) and the measure of angle P is (180 - x) degrees

Given that

Arc are intercepted by tangents and the exterior angle

The theorem of intersected tangents states that

The measure of the angle is the difference between the measures of the arc

So, the relationship of the angle is ∠P = 1/2(ACB - AB)

Here, we have

AB = x

This means that

ACB = 360 - x

So, we have

∠P = 1/2(360 - x - x)

When evaluated, we have

∠P = 180 - x

Hence, the measure of angle P is 180 - x degrees

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The rays of the angle from the measure 1/2 turn is 180 degrees

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

Angle measure = 1/2 turn

By definition, rays have two endpoints where they extend indefinitely on  one of the endpoints

As a general rule, we have

Substitute the known values in the above equation, so, we have the following representation

Angle measure = 1/2 * 360

Evaluate

Angle measure = 180

Hence, the angle measure is 180 degrees

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The value of x based on the stated expression using mathematical operations is -1.

The calculation of x will be performed using mathematical operations in following format. Here are the steps -

Solve the parenthesis

18x + 72 = 54

Switch the position of number 72 from Left Hand Side to Right Hand Side

18x = 54 - 72

Performing subtraction on Right Hand Side of the equation

18x = -18

Rewrite the equation according to x

x = -18/18

Performing division on Right Hand Side of the equation

x = -1

Hence, the value of x is -1.

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The following which could not be the coordinates of one of its other vertices is (1, -5).

Given that,

Rectangle has side lengths of 3 and 4.

One of the vertices = (1, 2).

We have to find the other coordinates of the vertex.

The distance from the other vertex to this vertex needs to be either 3 or 4.

Find the distance using the distance formula.

A. (-3, -1) from (1, 2)

Distance = √(1 + 3)² + (2 + 1)² = √25 = 5

B. (1, -5) from (1, 2)

Distance = √(1 - 1)² + (2 - -5)² = √49 = 7

C. (5, -1) from (1, 2)

Distance = √(1 - 5)² + (2 - -1)² = √25 = 5

D. (-2, 6) from (1, 2)

Distance = √(1 - -2)² + (2 - 6)² = √25 = 5

Hence the coordinate which cannot be the other vertex is (1, -5).

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Answer:

Bellow

Step-by-step explanation:

1a) The point estimate of the population price difference between red and white wines is given by:

$$\bar{x}_1 - \bar{x}_2 = 20.87 - 19.33 = 1.54$$

Therefore, the point estimate of the population price difference between red and white wines is $1.54.

1b) The margin of error for alpha=0.01 can be calculated using the following formula:

$$ME = z_{\alpha/2}\cdot\sqrt{\frac{s_1^2}{n_1} + \frac{s_2^2}{n_2}}$$

where $z_{\alpha/2}$ is the critical value of the standard normal distribution for the given level of significance, $s_1$ and $s_2$ are the sample standard deviations, and $n_1$ and $n_2$ are the sample sizes for the two populations.

For alpha=0.01, the critical value of the standard normal distribution is $z_{\alpha/2}=2.58$. Substituting the given values, we get:

$$ME = 2.58\cdot\sqrt{\frac{2.88^2}{40} + \frac{3.05^2}{40}} \approx 1.01$$

Therefore, the margin of error for alpha=0.01 is approximately $1.01.

1c) The confidence interval for the difference between the two population means can be calculated using the following formula:

$$(\bar{x}_1 - \bar{x}_2) \pm z_{\alpha/2}\cdot\sqrt{\frac{s_1^2}{n_1} + \frac{s_2^2}{n_2}}$$

For alpha=0.05, the critical value of the standard normal distribution is $z_{\alpha/2}=1.96$. Substituting the given values, we get:

$$(20.87 - 19.33) \pm 1.96\cdot\sqrt{\frac{2.88^2}{40} + \frac{3.05^2}{40}}$$

Simplifying this expression, we get:

$$(1.54) \pm 1.11$$

Therefore, the 95% confidence interval for the difference between the two population means is approximately $(0.43, 2.65)$.

Answer:

100

Step-by-step explanation:

To solve for y in the equation Y/1/5=20, we can multiply both sides of the equation by 1/5 to isolate y on one side of the equation. This gives us:

Y/1/5 * 1/5 = 20 * 1/5

Simplifying this expression gives us:

Y = 100

Therefore, the value of y is one hundred.

Answer:

Y = 4

Step-by-step explanation:

Now we have to,

→ Find the required value of Y.

The equation is,

→ Y/(1/5) = 20

Then the value of Y will be,

→ Y/(1/5) = 20

Simplifying the left hand side:

→ Y × (5/1) = 20

→ 5Y/1 = 20

→ 5Y = 20

Dividing 20 by the number 5:

→ Y = 20/5

→ [ Y = 4 ]

Hence, the value of Y is 4.

The missing part of the table is completed as shown below

x      y

-1   1 / 6

0    1

3     216

Exponential function is a function of the form f(x) = a(b)^x

Considering the given problem,

the starting = a

the base = b

the exponents = x

Using the formula, y = 6^x the table is completed by substitution

for x = -1

y = 6^(-1) = 1/ 6

for x = 0

y = 6^(0) = 1

for x = 3

y = 6^(3) = 216

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The probability of drawing two green cards is 25/169

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

Cards = 13

Green = 5

Selecting the first card we have

P(Green) = 5/13

The card is returned

So, we have the probablility of the second to be

P(Green) = 5/13

The probability of drawing two green cards is

P = 5/13 * 5/13

Evaluate

P = 25/169

Hence, the probability is 25/169

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Answer:  21/29

Step-by-step explanation:

sin B = opposite side/hypotenuse

=21/29

Answer:

21/29

Step-by-step explanation:

sin B= opposite/hypotenuse

sin B = 21/29

Asymptotic stability is a property of a dynamical system where the solutions of the system approach a particular equilibrium point as time goes to infinity, but they do not oscillate or move away from the equilibrium point. In other words, the solutions of the system converge to the equilibrium point as time goes to infinity.

Formally, a critical point x* of a dynamical system x' = f(x) is asymptotically stable if for any solution x(t) that starts sufficiently close to x*, there exists a positive constant ε such that ||x(t) - x*|| → 0 as t → ∞, where ||.|| denotes the Euclidean norm.

Intuitively, this means that if the initial condition of the system is perturbed slightly from the equilibrium point, then the solutions of the system will still converge to the equilibrium point as time goes to infinity. This is a desirable property for many systems, as it implies that the system will eventually settle down to a steady state.

The concept of asymptotic stability is often studied in the context of linear systems, where the stability of the equilibrium point is determined by the eigenvalues of the system matrix. For a linear system, the equilibrium point is asymptotically stable if all the eigenvalues have negative real part. In this case, the solutions of the system decay to zero exponentially as time goes to infinity.

Overall, asymptotic stability is an important concept in the study of dynamical systems, as it provides a way to analyze the long-term behavior of a system and predict its future state.

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In triangle LMN, l = 6.9 cm, m = 8.1 cm and n=8.8 cm then the  measure of ∠N is 71.3 degrees

The equation to set up for this, following the pattern for the Law of Cosines, is as follows:

From triangle LMN

n² = m² + l² - 2 mlcos N

We have to find the measure of ∠N

8.82 = 8.12 + 6.92 - 2( 8.1)(6.9) cos N

77.44 = 113.22 - 111.78 cos N

Subtract 113.22 on both sides

-35.78 = -111.78 cos N.

Divide both sides by 111.78

cos N = 0.32

N=Cos⁻¹(0.32)

N=71.3 degrees

Hence, in triangle LMN, l = 6.9 cm, m = 8.1 cm and n=8.8 cm then the  measure of ∠N is 71.3 degrees

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Haru can go on 12 rides for $10.25, assuming he rents a mat for each ride and the prices remain unchanged.

The amount charged by slide = $1.25

Amount to rent a mat per ride = $0.75

Total amount with Haru = $10.25

Calculating the total amount that Haru has -

= Total amount with Haru - The amount charged by slide

= $10.25 - $1.25

= $9.00

Dividing is a mathematical process that includes dividing a sum into groups of equal size. It includes a remainder and a quotient as well.

Determining the number of rides Haru can go on:

= $9.00/ $0.75

= 12

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The solutions in radical form is

This is of the form

(3 ± √7)²

Then we have to write this in two cases such that

Case 1: (3 + √7)²

Case 2: (3 - √7)²

Solve the first case

(3 + √7)²

(3 + √7)(3 + √7)

= 3² + 2(3)(√7) + (√7)² =

9 + 6√7 + 7

= 16 + 6√7

Next we have to solve for case 2

(3 - √7)²

(3 - √7)(3 - √7)

= 3² - 2(3)(√7) + (√7)²

= 9 - 6√7 + 7

= 16 - 6√7

The values and solutions would be:

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Answer:

A

Step-by-step explanation:

x^2-6x+9

to factorise this you need two numbers that times to make 9 and add to make -6

these two numbers are -3 and -3

putting it into brackets is

(x-3)(x-3)

this can also look like

(x-3)^2

so the answer is A

Answer: One way is video games. Video games help people escape from reality, which prevents people from going out and exercising. One way is treadmills, where you are able to increase your heart rate through cardio without straining the body.

Step-by-step explanation: a

The equation of the line is y = 1/2x - 2

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

y= 1/2x +1

Point = (8, 2)

Parallel lines have equal slopes

This means that the slope of the line is 1/2

So, the eqiuation is calculated as

y = m(x - x1) + y1

substitute the known values in the above equation, so, we have the following representation

y = 1/2(x - 8) + 2

Evaluate

y = 1/2x - 2

Hence, the equation is y = 1/2x - 2

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The angles of the cyclic quadrilateral are

In a cyclic quadrilateral the opposite angles are supplementary hence we have that

x - 4 + x + 8 = 180 degrees

gathering like terms

2x = 180 - 8 + 4

2x = 176

isolating x

x = 88 degrees

angles on each side

x- 4 = 88 - 4 = 84

x + 8 = 88 + 8 = 96

2x - 78 = 2(88) - 78 = 98

sum of the angles of a cyclic quadrilateral is 360

the fourth angle = 360 - 84 - 96 - 98

the fourth angle = 80 degrees

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