AnswersMath 7 B M12 2526 S2Cumulative Exam

Cumulative Exam — Cumulative exam Answers

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A professor wants to determine information about the Internet usage of middle school students in one state. A sample of 500 boys and girls from middle schools across the state were asked, “How do you access the Internet when you are not at school?” Which best explains why the sample can be used to determine statistics that apply to the population?

A
The sample represents the population.
B
The sample is larger than the population.
C
Each person in the population knows at least one person included in the sample.
D
Each person in the sample has Internet access while they are not at school.
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Devonte opens a savings account by making a deposit of $249.45. Every week, he deposits another $31.75 in the account. Which expression shows the amount of money that will be in the account weeks after the account is opened?

Question illustration
A
249.45 w + 31.75
Option A
B
249.45 w minus 31.75
Option B
C
249.45 + 31.75 w
Option C
D
249.45 minus 31.75 w
Option D
43

LaTesha and Bernard are playing a game. Their scores for five games are shown in the table below.LaTesha’s and Bernard’s ScoresLaTesha’s Scores9245673680Bernard’s Scores6368626953Which statement comparing the means to the ranges is true?

A
The means differ by 1, but the ranges differ by 40.
B
The means differ by 1, but the ranges differ by 2.
C
The means differ by 5, but the ranges differ by 40.
D
The means differ by 5, but the ranges differ by 2.
44

Kayla created the graph below to represent the solution to the inequality .What errors did she make? Select two options.

Question illustration
A
She should have used an open circle at the end of the ray.
B
She should have pointed the arrow to the right.
C
She should have used a circle at –7 as the end of the ray.
D
She should have used a circle at –9 as the end of the ray.
45

A rectangular pyramid has a volume of , a height of 24 in., and a base length of 6 in. What is the width of its base?

Question illustration
A
3 in.
B
9 in.
C
18 in.
D
27 in.
46

Which graph shows the solution set for ?

Question illustration
A
A number line going from negative 10 to 0. An open circle is at negative 7. Everything to the left of the circle is shaded.
Option A
B
A number line going from negative 10 to 0. An open circle is at negative 7. Everything to the right of the circle is shaded.
Option B
C
A number line going from 0 to 10. An open circle is at 7. Everything to the left of the circle is shaded.
Option C
D
A number line going from 0 to 10. An open circle is at 7. Everything to the right of the circle is shaded.
Option D
47

Tram left a tip of $9, which was of the total cost of the food. Which shows the correct equation and value of x, the total cost of the food?

Question illustration
A
; x = $1.35
Option A
B
; x = $60
Option B
C
; x = $1.35
Option C
D
; x = $60
Option D
48

To remain a member of student council, a student must attend at least of the activities. Joey attends 15 of the activities and remains on the student council. Which inequality represents the total amount of student council activities, a?

Question illustration
A
Three-fourths a greater-than-or-equal-to 15
Option A
B
Three-fourths a less-than-or-equal-to 15
Option B
C
Three-fourths a less-than 15
Option C
D
Three-fourths a greater-than 15
Option D
49

Andre hit 46 balls at practice. He hit no fewer than 20 less than double the number of hits Jason had. Which inequality represents the situation if j represents the number of hits Jason had?

A
46 minus 20 less-than 2 j
Option A
B
2 j minus 20 less-than-or-equal-to 46
Option B
C
46 minus 20 less-than-or-equal-to 2 j
Option C
D
2 j minus 20 greater-than-or-equal-to 46
Option D
50

An airplane can seat up to 175 passengers. The airline has already sold 87 tickets for a flight on the airplane. Which graph represents the solution to the inequality that finds the number of tickets the airline can still sell?

A
A number line going from 80 to 91. A solid circle is at 88. Everything to the left of the circle is shaded.
Option A
B
A number line going from 80 to 91. An open circle is at 88. Everything to the left of the circle is shaded.
Option B
C
A number line going from 80 to 91. An open circle is at 87. Everything to the right of the circle is shaded.
Option C
D
A number line going from 80 to 91. A closed circle is at 87. Everything to the right of the circle is shaded.
Option D

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