AlgebraMediumGreatest distance within a rental budget
Algebra practice question
A car rental costs $40 per day plus $0.25 per kilometre driven. A driver rents the car for 2 days and has a budget of at most $150. What is the greatest whole number of kilometres the driver can drive?
Answer: 280
80 + 0.25k ≤ 150 → 0.25k ≤ 70 → k ≤ 280.
Common wrong answers
- If you answered 70
- 70 is the dollars left for kilometres, not the kilometres.
- If you answered 440
- 440 comes from using one day's charge: 40 + 0.25k ≤ 150.
- If you answered 600
- 600 comes from 150 ÷ 0.25, ignoring the daily charges.
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