Problems With Equations

Brianna rents a bouncy house for a birthday party. It costs $30 plus $4 per hour. If she spends a total of $78, how many hours did she keep the bouncy house?

• 30 - 78 = 4h

• 30 + 4h = 78

• 30 - 4h = 78

• 78 + 30 = 4h

Eight less than one-fourth of a number is -2. Which equation below represents this scenario?

Solve: - 8 + 2x = - 2x + 4

• x = -3

• x = -1

• x = 1

• x = 3

Solve: −3(x−8)=39

• x = -21

• x = 5

• x = -5

• x = 21

• A
• B
• C
• D

A toy company spends $1500 per day for factory expenses plus $8 to make each teddy bear.  They sell the teddy bears for $12 a piece.  Which equation could be used to find the number of bears t the company has to sell in one day to equal its daily cost?

• 1500 + 8t = 12

• 12 + 8t = 1500

• 1500 + 8t = 12t

• 8t = 12t + 1500

Scott works on cars. He charges $35 for each car plus $7 per hour. Write an equation that represents this scenario if Kylie's car bill was $63.

• 7x + 35 = 63

• 7x = 63

• 7x - 35 = 63

• 35x + 7 = 63

The temperature where Cally lives is 73℉ and is falling 2℉ per hour. Which of the following equations can be used to determine how many hours (h) it will take for the temperature to drop to 65℉?

• 73 - 2h = 65

• 73 - 65 = 2h

• 65 - 2h = 63

• 2h - 73 = 65

Jim works at a local restaurant. He earns $8 an hour, plus tips. If Jim earned $350 last week, which included $270 in tips, how many hours did he work?

• 8/h + 270 = 350

• 350 = 270 + 8 + h

• 350 = 270 + 8h

• 350 -270 = h

Write an equation for "What number is 57% of 1200?".