AlgebraEasy–MediumEvaluating a fee-plus-rate model
Algebra practice question
A car park charges $3 to enter plus $2 for each hour parked. How many dollars does it cost to park for 5 hours?
Answer: 13
Cost = 3 + 2(5) = 3 + 10 = 13.
Common wrong answers
- If you answered 10
- 10 is the hourly part alone; add the $3 entry fee.
- If you answered 11
- 11 is 3 + 2 × 4, one hour short.
- If you answered 25
- 25 is (3 + 2) × 5, charging the entry fee every hour. The $3 is paid once.
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