AlgebraEasyEvaluating a rental cost model
Algebra practice question
The cost, in dollars, of renting a bicycle for h hours is given by C = 5h + 2. What is the cost of renting the bicycle for 3 hours?
Answer: 17
C = 5(3) + 2 = 15 + 2 = 17.
Common wrong answers
- If you answered 10
- 10 is 5 + 2 + 3, adding instead of multiplying.
- If you answered 15
- 15 is 5 × 3 without the $2.
- If you answered 21
- 21 is 5 × 3 + 2 × 3, charging the $2 every hour; it is paid once.
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