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Reika [66]
3 years ago
13

A student wants to compare textbook prices for two online bookstores. She takes a random sample of five textbook titles from a l

ist provided by her college bookstore, and then she determines the prices of those textbooks at each of the two websites. The prices of the five textbooks selected are listed below in the same order for each online bookstore. A: $115, $43, $99, $80, $119 B: $110, $40, $99, $69, $109 (a) Are these independent or dependent samples
Mathematics
1 answer:
gregori [183]3 years ago
5 0

Answer:

Dependent sample: The same textbook are being compared.

Step-by-step explanation:

We are given the following in the question:

A student wants to compare textbook prices for two online bookstores.

Sample 1 from bookstore A:

$115, $43, $99, $80, $119

Sample 2 from bookstore B:

$110, $40, $99, $69, $109

Dependent and independent sample:

  • Dependent samples are paired observations for same set of items.
  • Independent samples are observations made on two different sets of items.
  • If the values in one sample affect the observations in the other sample, then the samples are dependent.
  • If the values in one sample have no effect about those of the other sample, then the samples are independent.

Thus, the given sample is dependent sample as the same textbook is being compared from two different bookstore.

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Write two expressions to show the total area of advertisement space on one page.
valina [46]

The area covered by the advertisement on the page is ab  \ unit^2.

<h3>What is the definition of area of a rectangle?</h3>

The area of a rectangle covers is the space it takes up inside the boundaries of its four sides. The dimensions of a rectangle determine its area. In general, the area of a rectangle is equal to the product of its length and breadth of the rectangle.

The formula of area of rectangle is length \times breadth unit^2

let the given page represents a rectangle.

We take the length of the advertisement is a unit and breadth of the advertisement is b unit.

The area of the advertisement =a \times b \ unit^2

                                                   =ab \ unit^2

Therefore, the area covered by the advertisement on the page is ab  \ unit^2

To learn more about area of a rectangle from the below link

brainly.com/question/25292087

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7 0
1 year ago
3(5x+2)=2(3x-6)<br> help i need to show work and I have no idea how to do this
tester [92]

Answer: its −2

Step-by-step explanation:

3*(5*x+2)-(2*(3*x-6))=0  

Step by step solution :

STEP

1

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STEP

2

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Pulling out like terms

2.1     Pull out like factors :

  3x - 6  =   3 • (x - 2)  

Equation at the end of step

2

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 (3 • (5x + 2)) -  6 • (x - 2)  = 0  

STEP

3

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Equation at the end of step 3

 3 • (5x + 2) -  6 • (x - 2)  = 0  

STEP

4

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STEP

5

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Pulling out like terms

5.1     Pull out like factors :

  9x + 18  =   9 • (x + 2)  

Equation at the end of step

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 9 • (x + 2)  = 0  

STEP

6

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Equations which are never true

6.1      Solve :    9   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation:

6.2      Solve  :    x+2 = 0  

Subtract  2  from both sides of the equation :  

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One solution was found :

x = -2

8 0
3 years ago
Read 2 more answers
Work out the value of x <br>​
GREYUIT [131]
A full circle is 360°.

x + 3x + 90° = 360°

4x = 360° - 90°

4x = 270°

4x/4 = 270°/4

x = 67.5°

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6 0
3 years ago
The amount of orange juice in a bottle is modeled by the equation y=128-8x, where y is the number of ounces of juice in the bott
Fantom [35]

Answer:

Number of servings left is bottle = 128-9x

Step-by-step explanation:

The amount of orange juice in a bottle is modeled by the equation

y=128-8x ---Eq (1)

Here y = number of ounces of juice in the bottle

and x = number of servings of juice poured from the bottle

Number of servings left is bottle =  number of ounces of juice in the bottle -number of servings of juice poured from the bottle

Thus,

Number of servings left is bottle =  y -x

Substracting x from both the sides of the above equation, we get - y-x = 128-8x-x\\y-x = 128-9x

Number of servings left is bottle = 128-9x

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