Which of the following statements is true about regression? (a) the intercept represents the slope of the best fit line when developing a regression model, the anaylst chooses a line which maximizes (b) error (c) independent variables are known as predictors (d) regression is considered an antonym (opposite) of predictive analytics A local restaurant is premiering two new dishes in one night. From the customers who went to the restaurant that night, 71% chose to eat Dish A, and the other 29% chose to eat Dish B. Of those that chose Dish A, 65% enjoyed it. Of those that chose Dish B, 19% enjoyed it. Calculate the joint probability that a randomly selected customer chose Dish A and enjoyed it. Specify your answer to at least 3 decimals. (Hint: creating a probability tree may help) number (rtol=0, atol=0.001) An analyst wants to understand the impact of class standing (Freshman, Sophomore, Junior, or Senior are the four possible categories) on the GPA of students (variable G) in the Gies College of Business. The analyst creates a regression model for the prediction: Ĝ = bo + b1(Freshman) + b2(Sophomore) + b3(Junior) + b (Senior) What is wrong about this regression model? (a) Predicting GPA requires the grades of the students, not just class standing. (b) The variables Freshman and Sophomore are positively correlated. (c) There is no relationship between class standing and GPA. (d) The analyst included all four dummy variables in the model. (e) The analyst should use a quadratic relationship instead of a linear relationship.

Answers

Answer 1

The statement regarding regression which is true is (c) independent variables are known as predictors. The joint probability of selecting Dish A and enjoying it is 0.462. The wrong about the regression model is that (d) the analyst included all four dummy variables in the model.

In regression analysis, the independent variables (also known as predictors or input variables) are used to predict or explain the dependent variable (also known as the outcome or response variable). The independent variables are typically numerical or categorical variables that are believed to have a relationship with the dependent variable.

The probability of selecting Dish A and enjoying it is given as follows:

Probability of choosing Dish A = 0.71

Probability of enjoying Dish A = 0.65

Probability of selecting Dish B = 0.29

Probability of enjoying Dish B = 0.19

The joint probability of selecting Dish A and enjoying it is:

0.71 * 0.65 = 0.4615 (rounded to 4 decimal places)

Hence, the answer is 0.462. (rounded to 3 decimal places)

The analyst wants to analyze the impact of class standing on the GPA of students in the Gies College of Business. The analyst creates a regression model for the prediction: Ĝ = bo + b1(Freshman) + b2(Sophomore) + b3(Junior) + b (Senior).

The regression model is incorrect since the analyst included all four dummy variables in the model.

Hence, the correct option is (d) The analyst included all four dummy variables in the model.

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Related Questions

PLEASE HELPPPoirnginrigniniervifire

Answers

Answer:

555 m

Step-by-step explanation:

Because the model should have identical proportions to the real-life tower, the ratio between the height and shadow length of both diagrams should be the same.

Height (model)             Height (real)
-------------------------  =  ------------------------
Shadow (model)         Shadow (real)

Math:

 0.9 meters                   x
--------------------  =  ----------------------               <----- Ratio
 0.2 meters           123.3 meters

4.5 = x / 123.3 meters                                  <----- Divide 0.2 from 0.9

555 meters = x                                            <----- Multiply both sides by 123.3

During a snowstorm, Madeline tracked the amount of snow on the ground. When the storm began, there were 3 inches of snow on the ground. Snow fell at a constant rate of 1 inch per hour until another 2 inches had fallen. The storm then stopped for 3 hours and then started again at a constant rate of 2 inches every 3 hours for the next 9 hours. When the storm stopped again, the sun came out and melted the snow for the next 2 hours at a constant rate of 3 inches per hour. Make a graph showing the inches of snow on the ground over time using the data that Madeline collected.

Answers

The graph depicts that at the end of the snowstorm, there was 5 inches of snow left. See the attached graph.

How many hours did the snow fall?

It is not be noted that the total amount of hours which the snow fell is:

2 + 9 = 11 hours.

Although the graph depicts a peak of 14 hours, recall that there were three hours when the snow didn't fall.

While the maximum depth of the snow was 11 inches.

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Instructions: State what additional information is required in order to know that the triangles in the image below are congruent for the reason given.

Reason: SAS Postulate

Answers

When two or more given triangles are congruent, this implies that the measures of their corresponding angles and sides are equal. So that the additional information required in the question is FG ≅ IJ.

When two or more given triangles are congruent, this implies that the measures of their corresponding angles and sides are equal. Thus the congruent relations of the triangles can be with respect to their angles or/ and sides.

The two given triangles in the question would be congruent with respect to the Side-Angle-Side (SAS) postulate if the condition below is true:

i.e FG ≅ IJ

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The area of the base of the cone is 8 pi mm^2. what is the volume of the cone in terms of pi?

Answers

The volume of cone whose area of base is 8π[tex]mm^{2}[/tex] is 32π/3 [tex]mm^{3}[/tex].

Given area of base of the cone 8π[tex]mm^{2}[/tex].

We are required to find  the volume of the cone.

We know that base of a cone used to be in circle  so the area of base of cone is equal to π[tex]r^{2}[/tex].

Area=8π   (given)

π[tex]r^{2}[/tex]=8π

[tex]r^{2}[/tex]=8

r=[tex]\sqrt{8}[/tex]

r=2[tex]\sqrt{2}[/tex]

Volume of cone=1/3*π[tex]r^{2} h[/tex]

=1/3*π[tex](2\sqrt{2} )^{2}[/tex]*4

=1/3*8*4π

=32π/3

(We are not required to put value of π so our answer will be 32π/3.)

Hence the volume of cone whose area of base is 8π is 32π/3.

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Question is incomplete as it should also include height of cone be 4 mm.

For how many positive integers $n$ less than or equal to $24$ is $n!$ evenly divisible by $1 2 \dots n$

Answers

The value of positive integers in the set are 16.

According to the statement

we have given that the there is a set of numbers from 1 to n and we have to find that the how many integers in this set. and there is one condition that the numbers in the set are less than or equal to 24.

So, For this purpose,

Since [tex]$1 + 2 + \cdots + n = \frac{n(n+1)}{2}$[/tex]

the condition is equivalent to having an integer value for [tex]$\frac{n!} {\frac{n(n+1)}{2}}$.[/tex]

This reduces, when [tex]$n\ge 1$[/tex], to having an integer value for [tex]$\frac{2(n-1)!}{n+1}$[/tex]

This fraction is an integer unless n+1 is an odd prime. There are 8 odd primes less than or equal to 24,

so there are 24-8 = 16.

So, The value of positive integers in the set are 16.

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The calculator shows the result that Enrique got after evaluating the expression 56 + 7 × (34 – 17) – 16 . He checked his work by rounding all of the values to the nearest ten and comparing it to the calculator result. Which is true regarding his estimate and the accuracy of his calculator result?

Answers

Answer:

The estimated result is 680, which suggests the calculator is incorrect.

answer choices would have helped, hope this helps :)

2/y = 4/2 find y
Answer is y=1 but how?​

Answers

[tex] \frac{2}{y} = \frac{4}{2} [/tex]

[tex]4 = 4y[/tex]

[tex] \frac{4}{4} = y[/tex]

[tex]1 = y[/tex]

Hope it helps you any confusions you may ask!

Let's see

2/y=4/22/y=2y=2/2y=1

Verified

Help me with this please

Answers

Answer:

Step-by-step explanation:


Select the correct answer.
The parent function f(x)=√x is transformed to g(x) = 2f(x-3). Which is the graph of g(x)?

Answers

The function g(x) is a translation of 3 units to the right and a vertical dilation by scale factor k = 2 of f(x), the graphs of both functions can be seen in the image at the end.

Which is the graph of g(x)?

We know that g(x) is a transformation of the parent function f(x) = √x, such that:

g(x) = 2*f(x - 3)

g(x) = 2*√(x - 3)

Then we can see that g(x) is a translation of 3 units to the right followed by a vertical dilation of scale factor 2 of the parent function f(x).

So to graph g(x) you first need to move the whole graph of f(x) 3 units to the right, and then apply a dilation vertically.

The graph of g(x) and f(x) can be seen in the image below:

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pls help asap............

Answers

See below for the solution to each question

Is the graph a function?

Yes, the graph is a function.

This is because all x values have different y values

The domain

This is the set of input values of the graph.

From the graph, we have

x = 0 to x = 17

Hence, the domain is [0, 17]

The range

This is the set of output values of the graph.

From the graph, we have

y = 0 to y = 10

Hence, the range is [0, 10]

The maximum

This is the maximum point on the graph.

From the graph, we have

Maximum = (12, 10)

The minimum

This is the minimum point on the graph.

From the graph, we have

Minimum = (0, 0)

The increasing intervals

These are the intervals where the y values increase as x increase.

From the graph, we have

Increasing intervals = (0, 5) ∪ (10, 12) ∪ (14, 15)

The decreasing intervals

These are the intervals where the y values decrease as x increase.

From the graph, we have

Decreasing intervals = (7, 10) ∪ (12, 14) ∪ (15, 17)

The constant intervals

These are the intervals where the y values remain unchanged as x changes.

From the graph, we have

Constant intervals = (5, 7)

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Provide reasons for the statements.

Given: ∠1 and ∠3 are vertical angles.

Prove: ∠1 ≅ ∠3

(See image for more details on the equation, please.)

Answers

The reasons for the statement about the angles include:

3. Definition of linear pair.

4. Definition of supplementary angles.

5. Substitution.

6. Subtraction property of equality.

7. Definition of congruence.

How to illustrate the information?

The angles are supplementary because the angles 1 and 2, 2 and 3 form a linear pair and thus because of the definition of linear pair, they are supplementary angles.

The sum of angles of 1 and 2, 2 and 3 is equal to 180 because these pair of angles are supplementary angles. Supplementary angles are those angles whose sum is 180 degrees.

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Wey wey wonders how much water it would take to fill her cup. she drops her pencil in her cup and notices that it only fits diagonally. the pencil is 17 centimeters long and the cup is 15 centimeters tall. how much water can the cup hold? use paper to help you with your thinking.

Answers

Answer:

240π cm³ (exact)

754 cm³ (approximate)

Step-by-step explanation:

I assume the shape of the cup is a cylinder. The height of the cylinder is 15 cm.

Think of a vertical rectangle that contains the vertical axes of the cylinder.

Two sides of the rectangle are diameters of the bases of the cylinder. The other two side are heights of the cylinder. The pencil is 17 cm long and is a diagonal of this rectangle. We can find the diameter of the base of the cylinder using the Pythagorean theorem.

In a rectangle that is 15 cm long, the diagonal measures 17 cm.

a² + b² = c²

15² + b² = 17²

b = 8

The diameter of the cup is 8 cm.

radius = 8 cm/2 = 4 cm

V = πr²h

V = π(4 cm)²(15 cm) = 240π cm³ (exact)

V = 754 cm³ (approximate)

Can someone help me please

Answers

The inverse function of g(x) is:

[tex]f(x) = -\frac{3}{x + 4}[/tex]

So the correct option is D.

How to get the inverse of g(x)?

Here we have the function:

[tex]g(x) = -\frac{3}{x} - 4[/tex]

Remember that two functions f(x) and g(x) are inverses if:

[tex]f(g(x)) = x\\g(f(x)) = x[/tex]

Then we must have:

[tex]g(f(x)) = -\frac{3}{f(x)} - 4 = x[/tex]

Solving for f(x), we get:

[tex]-\frac{3}{f(x)} - 4 = x\\\\ \frac{3}{f(x)} +4 = -x[/tex]

[tex]\frac{3}{f(x)} = -x - 4\\\\3 = (-x - 4)*f(x)\\\\\frac{3}{-x - 4} = f(x) = -\frac{3}{x + 4}[/tex]

Then the correct option is D.

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Vic is standing on the ground at a point directly south of the base of the CN Tower and can see the top when looking at an angle of elevation of 61°. Dan is standing on the ground at a point directly west of the base of the tower and must look up at an angle of elevation of 72° in order to see the top. If the CN Tower is 553.3 m tall,how far apart are Vic and Dan to the nearest meter? Include a well-labeled diagram as part of your solution.

Answers

Vic and Dan are 2, 897m apart.

How to determine the distance

It is important to note that the distance between Vic and Dan is the base of CN

Let's say the distance to Dan is x

The distance to Vic is y

Using cosine ratio, we have

cos α = opposite / adjacent

α = 72°

opposite = 553. 3cm

Adjacent = x

cos  72° = [tex]\frac{553. 3}{x}[/tex]

Cross multiply

[tex]cos 72[/tex] × [tex]x[/tex] = [tex]553. 3[/tex]

[tex]0. 3090x= 553. 3[/tex]

[tex]x = \frac{553. 3}{0. 3090}[/tex]

[tex]x = 1, 790. 61[/tex] m

The distance to Vic is y

Using the cosine ratio, we have

[tex]cos 60 = \frac{553. 3}{y}[/tex]

Cross multiply

[tex]0. 5y = 553. 3[/tex]

[tex]y = \frac{553. 3}{0. 5}[/tex]

[tex]y = 1,106. 6[/tex]m

To determine how far apart Vic and Dan, we use = x + y

= 1790. 61 + 1106. 6

= 2, 897. 21m

= 2, 897m

Thus, Vic and Dan are 2, 897m apart.

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A student missed 45 problems on a mathematics test and received a grade of 39%. If all the problems were of equal value, how many problems were on the test

Answers

There were 74 problems in the test.

Rounding-off percentage

Let the student got total number of problems in the test to be X.

Percentage of correct answer = 39 %

⇒ 61% of X were incorrect

⇒61/100 x X = 45

⇒61X = 45x100

⇒X = 4500/61

⇒X=73.77

After rounding off 73.77, we get 74.

Hence, we can say that there were total of 74 problems in the test.

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The denominator of a fraction exceeds numerator by 3. If the numerator is doubled and the denominator is increased by 14, then fraction becomes 2/3rd of the original fraction.

Answers

Answer:

The original fraction is 4/7

Step-by-step explanation:

Let the fraction be x/y.

According to question we have the following equations.

The denominator of a fraction exceeds numerator by 3:

y = x + 3

If the numerator is doubled and the denominator is increased by 14, then fraction becomes 2/3rd of the original fraction:

2x/(y + 14) = (2/3)*(x/y)

Change the fraction as below and solve for y:

2x /(y + 14) = 2x/(3y)                       Nominators are samey + 14 = 3y                                      Compare denominators2y =  14y = 7

Find the value of x using the first equation:

7 = x + 3x = 7 - 3x = 4

The fraction is:

x/y = 4/7

Answer:

Original fraction = ⁴/₇

Step-by-step explanation:

Numerator:  top of the fraction

Denominator: bottom of a fraction

Let x be the original numerator.

If the denominator of a fraction exceeds the numerator by 3:

[tex]\implies \dfrac{x}{x+3}[/tex]

If the numerator is doubled and the denominator is increased by 14, then fraction becomes 2/3rd of the original fraction:

[tex]\implies \dfrac{2x}{x+3+14}=\dfrac{2}{3}\left(\dfrac{x}{x+3}\right)[/tex]

[tex]\implies \dfrac{2x}{x+17}=\dfrac{2x}{3(x+3)}[/tex]

[tex]\implies \dfrac{2x}{x+17}=\dfrac{2x}{3x+9}[/tex]

Cross multiply:

[tex]\implies 2x(3x+9)=2x(x+17)[/tex]

Divide both sides by 2x:

[tex]\implies 3x+9=x+17[/tex]

Subtract x from both sides:

[tex]\implies 2x+9=17[/tex]

Subtract 9 from both sides:

[tex]\implies 2x=8[/tex]

Divide both sides by 2:

[tex]\implies x=4[/tex]

Substitute the found value of x into the original fraction:

[tex]\implies \dfrac{4}{4+3}=\dfrac{4}{7}[/tex]

Therefore, the original fraction is ⁴/₇.

I am stuck on the answer for this question

Answers

Answer:

12/13

Step-by-step explanation:

Trigonometric ratio:

     [tex]\sf Cos \ x = \dfrac{adjacent \ side \ to \ \angle x}{hypotenuse}\\\\[/tex]

              [tex]\sf = \dfrac{XY}{ZX}\\\\=\dfrac{36}{39}\\\\=\dfrac{36 \div3}{39 \div 3}\\\\=\dfrac{12}{13}[/tex]

your anwer would be 12/13 love

Six is called a perfect number because its factors (not including 6) add up to itself, i.e. 1 + 2 + 3 = 6. find all the perfect numbers between 20 and 30

Answers

28. There is only one perfect number between 20 and 30.

28= 1+2+4+7+14

Hope this helps! :))

Two numbers are independently selected from the set of positive integers less than or equal to 5. What is the probability that the sum of the two numbers is greater than their product

Answers

There is a 9/25 chance that two numbers will be added together such that their total exceeds their product.

How to find out the probability

The set of positive numbers are:

{1,2,3,4,5}

We have to independently select two numbers from these sets.

We are trying to determine the likelihood that the sum is larger than the product of the integers.

When one of the chosen numbers is 1, the total will always be greater than the product because:

1*1=1 & 1+1=2

1*2=2 & 1+2=3

1*3=3 & 1+3=4

1*4=4 & 1+4=5

1*5=5 & 1+5=6

and so on.

If we select 2 as both numbers then,

2*2=4 & 2+2=4

Here sum and the product are equal.

If not, the product will be bigger than the sum.

Now, the first stage is to evaluate the total number of two combinations that are feasible:

We have 5 alternatives for the first number and 5 alternatives for the second number.

The product of the number of possibilities in each scenario yields the total number of combinations:

C= 5*5=25

The following combinations have a sum that is greater than the product :

1 and 1

1 and 2

1 and 3

1 and 4

1 and 5

2 and 1

3 and 1

4 and 1

5 and 1

So, we get 9 combinations.

So, Probability,p=9/25

Therefore it is concluded that the probability is 9/25.

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What is the following sum?
3/125x10,13 +3/27x10,13
O
○ 8x³y² (¹³√xy)
15x³y³ (³√xy )
O 15x5
O
15x³y² (2√xy)
O
○ 8x³y³ (³√xy)

Answers

[tex]\sqrt[3]{125x^{10}y^{13} } +\sqrt[3]{27x^{10}y^{13} }[/tex]=[tex]5\sqrt[3]{x^{10} y^{13} } +3\sqrt[3]{x^{10}y^{13} } = 8\sqrt[3]{x^{10}y^{13} }[/tex]

How to solve an expression?

[tex]\sqrt[3]{125x^{10}y^{13} } +\sqrt[3]{27x^{10}y^{13} }[/tex]

Therefore,

125 = 5³

27 = 3³

Hence,

[tex]5\sqrt[3]{x^{10} y^{13} } +3\sqrt[3]{x^{10}y^{13} }[/tex]

Hence,

Both cube root are the same now,

Therefore, we have to add them together.

[tex]5\sqrt[3]{x^{10} y^{13} } +3\sqrt[3]{x^{10}y^{13} } = 8\sqrt[3]{x^{10}y^{13} }[/tex]

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PLEASE HELP IM STUCK

Answers

Answer:

#3

Step-by-step explanation:

To create a number line to represent x<= 0, draw a solid circle at 0 (because 0 is included), then draw an arrow extending to the left (because it's less than or equal to).

Solving inequalities( need help checking my answer)

Answers

Step 1. You need x isolated.
[tex]x < 13+7[/tex]

When you move a number from the left to right (and its addition or subtraction, the sign stays (< ≤ > and ≥ is signs).
x<20 or in words, x is less than 20, and cannot be 20.

Answer:

x < 20

Any number less than 20 is a solution

Step-by-step explanation:

x-7 < 13

The first step to solve this inequality is to add 7 to each side

x-7+7 < 13+7

x < 20

Any number less than 20 is a solution

Triangle M N O maps to triangle M prime N prime O prime.

In the diagram, triangle MNO maps to triangle M'N'O'.

Complete the statements.

Angle M corresponds to angle
Side
is the image of side NO.

Answers

Angle M corresponds to angle M' and

Side N'O' is the image of side NO

The vertices of each triangle must have a one-to-one correspondence. This phrase means that the measure of each side and angle of each triangle is equal to the side or angle of the other triangle.

Here it is given that Triangle MNO maps to triangle M'N'O'

We need to find that Angle M corresponds to which angle and the image of side NO

By one to one correspondence we get that

Angle M corresponds to angle M' and

Side N'O' is the image of side NO

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The step 2 of a certain construction is shown below. What construction is being performed?

bisect an angle
copy an angle
copy a segment
construct a right anglers

Answers

The construction that is performed based on the information given will be D. construct a right angle.

What is construction?

It should be noted that construction simply means the accurate drawing of shapes, angles, and the line in geometry.

In this case, the construction that is performed based on the information given will be to construct a right angle.

It should be noted that a right angle has an angle of 90°.

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A taxi company charges a $2.00 base fare plus an additional fare based on a per-mile rate and a per-minute rate. Ryan's first taxi ride was 3.0 miles, took 7 minutes, and cost $8.50. His second taxi ride was 7.0 miles, took 14 minutes, and cost $16.00. If his third taxi ride took 10 minutes and cost $13.50, approximately how many miles was the third taxi ride

Answers

A $2.00 base fare charge, and per-mile, and per-minute rates related as follows; 3•x + 7•y = 6.5 and 7•x + 14•y = 14, give the distance traveled in the third ride as 4.5 miles

How can the length of the third ride be calculated?

The base fare = $2.00

Let x represent the per-mile rate, and let y represent the per-minute rate, we have;

The cost of Ryan's first taxi ride = $8.50

Distance traveled in the first ride = 3.0 miles

Time taken during the first ride = 7 minutes

Therefore;

2 + 3•x + 7•y = 8.5

Which gives;

3•x + 7•y = 8.5 - 2 = 6.5

3•x + 7•y = 6.5...(1)

Distance traveled in the second ride = 7.0 miles

Duration of the second ride = 14 minutes

The second ride cost = $16.00

Therefore;

2 + 7•x + 14•y = 16

Which gives;

7•x + 14•y = 16 - 2 = 14

7•x + 14•y = 14...(2)

Solving the above simultaneous equations by multiplying equation (1) by 2 then subtracting the result from equation (2) gives;

(7•x + 14•y) - 2 × (3•x + 7•y) = 14 - 2×6.5 = 1

x = 1

The per-mile rate, x = $1

3•x + 7•y = 6.5

7•y = 6.5 - 3•x

7•y = 6.5 - 3×1 = 3.5

y = 3.5/7 = 1/2 = 0.5

The per-minute rate, y = $0.5

Duration of the third taxi ride = 10 minutes

Cost of the third ride = $13.50

Therefore;

2 + 1×a + 10×y = $13.50

Where a is the distance traveled during the third ride, we have;

2 + 1×a + 10×0.5 = $13.50

2 + a + 5 = 13.5

a = 13.5 - 2 - 7 = 4.5

The third ride was, a = 4.5 miles

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Part b
calculate the perimeter of each quadrilateral and the ratio of the perimeters. round your answers to the hundredths place.

Answers

The perimeter of the quadrilateral illustrated is 30cm.

How to calculate the perimeter?

The information is incomplete. Therefore, an overview will be given. It should be noted ha perimeter simply means the addition of the sides given.

Let's assume that that we've a rectangle with length and width of 10 and 5cm.

The perimeter will be:

= 2(l + w)

= 2(10 + 5)

= 30cm

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help!!!!>>>>>>>Explain the difference between perimeter
and volume.
a. Perimeter represents space inside a three-
dimensional object. You use volume to
measure the distance around an object.
b. You use perimeter to measure the distance
around an object. Volume represents space
inside a two-dimensional object.
c. Perimeter represents space inside a two
dimensional object. You use volume to
measure the distance around an object.
d. You use perimeter to measure the distance
around an object. Volume represents space
inside a three-dimensional object.

Answers

d. Volume can only be found in 3d objects.

Given that e parallel f and g is a transversal, we know that angle 4 is-congruent-to angle 5 by the alternate interior angles theorem. we also know that angle 1 is-congruent-to angle 4 and angle 5 is-congruent-to angle 8 by the ________. therefore, angle 1 is-congruent-to angle 8 by the substitution property. corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem

Answers

∠5 ≅ ∠8 (vertically opposite angles)

Hence, ∠1 ≅ ∠8 by the transitive property.

How to find angles when parallel lines are cut by a transversal?

When parallel lines are cut by a transversal, angle relationships are formed. This include corresponding angles, alternate angles , vertical angles etc.

Therefore, line e and f are parallel lines cut by the the transversal g.

∠1 ≅ ∠4(vertically opposite angles)

Hence,

∠4 ≅ ∠8(corresponding angles)

Since, ∠1 ≅ ∠4

Then, by substitution,

∠1 ≅ ∠8 (transitive property)

∠5 ≅ ∠8 (vertically opposite angles)

Therefore, ∠1 ≅ ∠8 by the transitive property.

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A professor gave her students six essay questions from which she will select three for a test. A student has time to study for only three of these questions. What is the probability that, of the questions studied.

Answers

The probability that of the questions studied, all three were the test questions selected by the professor is 0.05.

How to find the probability?

We can find the probability by dividing the total number of favorable events by the total number of events.

The total number of events is given by [tex]6C_{3}[/tex].

The total number of favorable events is given by [tex]3C_{3}[/tex].

The probability is given by = Favorable events/Total number of events

= [tex]\frac{3C_{3}}{6C_{3}}[/tex]

= [tex]\frac{1}{\frac{(6)(5)(4)}{(1)(2)(3)} }[/tex]

= [tex]\frac{1}{(5)(4) }[/tex]

= 0.05

The probability that all three questions are selected by the professor for the test is found to be 0.05.

Therefore, we have found that the probability that of the questions studied, all three were the test questions selected by the professor is 0.05.

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Disclaimer: The question was incomplete, the complete question is attached below.

Question: A professor gave her students six essay questions from which she will select three for a test. A student has time to study for only three of these six questions. What is the probability that, of the questions studied, all three were the test questions selected by the professor?

Please help! It is due right now!!!
The total bill for dinner was $33.03 (including tax and a tip). If they paid a 20.2% tip, what was their bill before adding the tip?

Answers

Using proportions, it is found that their bill before adding the tip was of $27.48.

What is a proportion?

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

They paid a 20.2% tip, hence 120.2% = 1.202 of the price x is equals to $33.03, hence the bill before the tip is found as follows:

1.202x = 33.03

x = 33.03/1.202

x = $27.48.

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