Unit 4 Study Guide

Which inequality represents this graph?

• x > 0

• x > 0

• x < 0

• x < 0

Which inequality represents this graph?

• x < -3

• x > -3

• x < -3

• x > -3

Each DVD costs $13.20 and you have $85. Which inequality represents the maximum number of DVDs you can buy?

• 13.20x < 85

• 13.20x > 85

• x/13.20 < 85

• x + 13.20 > 85

Chris watches TV twice as much as Sam. If Chris watched for 38 hours, write an equation that can be used to find the number of hours Sam watched. S represents the hours Sam watched.

• 38s = 2

• 2s = 38

• s/2 = 38

• s + 2 = 38

Chris watches TV twice as much as Sam. If Chris watched for 38 hours, how many hours did Sam watch?

2s = 38

• 38 hours

• 18 hours

• 76 hours

• 19 hours

The minimum height a person must be to ride the water slide is 60 inches.

Write an inequality to show this.

• x < 60

• x > 60

• x < 60

• x > 60

The minimum height a person must be to ride the water slide is 60 inches.

Which of the following people are allowed to ride the water slide?

• Sarah, 52 inches

• Jack, 64 inches

• Mary, 60 inches

• Greg, 59 inches

Which of the following is NOT a solution to the inequality?

3y < 36

• 8

• 11

• 9

• 12

Which equation and solution represent the sum of a number and eight is sixty-three?

• n + 8 = 63 ; n = 55

• n + 8 = 63 ; n = 71

• n - 8 = 63 ; n = 71

• 8n = 63 ; n = 7.9

Madison bought $18 more in food this week than she did last week. If she spent $39 this week, choose the equation that will determine the amount she spent last week.

• 39 + x = 18

• 18x = 39

• x + 18 = 39

• 39x = 18