Quick Check 6.9A, 6.9C 6.10A Addition & Subtraction

Jeff bought a bottle of water for $2. He also bought some hot dogs for $3 each. Jeff did not spend more than $14 on the hot dogs and the bottle of water. Which inequality can be used to find h, the number of hot dogs that Jeff could have bought?

• 3h − 2 ≤ 14

• 3h + 2 ≤ 14

• 3h − 2 ≥ 14

• 3h + 2 ≥ 14

1. Which situation is best represented by the following equation?

45w + 123.95 = 753.95

• Erica paid $753.95 for dance classes. She paid a $45 registration fee and $123.95 for each week she was enrolled in the classes. What is w, the number of weeks Erica was enrolled in dance classes?

• Erica and her sister paid $753.95 for dance classes. Erica paid $123.95 for each week she was enrolled in the classes, and her sister paid $45 for each week she was enrolled in the classes. What is w, the number of weeks Erica and her sister were enrolled in dance classes?

• Erica paid $753.95 for dance classes. She paid a $123.95 registration fee and $45 for each week she was enrolled in the classes. What is w, the number of weeks Erica was enrolled in dance classes?

• Erica paid $753.95 for dance classes. She paid a $123.95 for each week she was enrolled in the classes after using a coupon that gave her $45 off the price per week. What is w, the number of weeks Erica was enrolled in dance classes?

The model represents an equation.

Select the equation and solution that represent the model.

• 2x + 5 = 11; x = 3

• x + 5 = 11; x = 6

• 2x + 5 = 11; x = 6

• x + 5 = 11; x = 3

Steven has 5 more x-box games than Devin. Devin's number of x-box games can be represented by n. If Stephen has 15 x-box games, how many games does Devin have?

• n = 10 because 15 = 5 + n

• n= 20 because n = 5 + 15

• n = 3 because 15 = 5n

• n = 75 because n = 15 x 5