0580/11 May/Jun 2023, Question 10: Substitution
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 2 marks
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The question, in short
Using the hire cost formula C = 12 + 3.5y, find how many hours Maria hired a bicycle for when she paid $36.50.
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Solution · 2 marks
- 136.50 = 12 + 3.5y
- 236.50 − 12 = 3.5y
- 324.5 = 3.5y
- 4y = 24.5 ÷ 3.5 = 7 hours
Answer7
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