CRM 3.2 Equations and Inequalities Study Guide

Solve the equation: k + 25 = 42. k = ________

• k = 17

• k = 15

• k = 20

• k = 10

Solve the equation shown: -7x = 26. x = ________

• x = -26/7

• x = 26/7

• x = 7/26

• x = -7/26

Solve the inequality: n - 7.4 > -5.2.

• n > 12.7

• n > 2.2

• n > -2.2

• n < 12.7

Solve the equation: 5(x - 10) = 25.

• x = 15

• x = 5

• x = 4.11

• x = -0.7

Solve the equation shown: 2.5(5x - 3) = 17.5.

• x = 4.27

• x = 2.20

• x = 2

• x = 2.75

Jolene paid $220 to get her washer repaired. The total cost of materials for the repair was $110 and the repair man charged $20 an hour. Which equation can be used to determine how many hours the mechanic worked on her car?

• 20+110h=220

• h+220=110

• 220+20h=110

• 20h+110=220

Monday night a Valet worked at the Fleming Steakhouse to earn $175.50. The Valet earned $8.50 per hour plus $107.50 in tips. Part A: Create an equation that can be used to determine the number of hours, ℎ, the Valet worked on Monday.

• 107.5h + 8.50 = 175.50

• 8.50h+107.5 =175.50

• 175.50h+107.5=8.5

• 175.50h+8.5=175.50

How many hours did the Valet work on Monday?

An inequality is shown. -7x < 110 What is the solution to the inequality?

• x < -22.7

• x > -15.7

• x < 112

• x > 114