AlgebraEasy–MediumMonths for which a monthly option is cheaper
Algebra practice question
A gym charges $40 per month, or $400 for a full year. For which numbers of months m of use in a year is paying monthly cheaper than paying for the year?
- A. m < 10Correct
- B. m ≤ 10
- C. m > 10
- D. m < 40
Answer: A. m < 10
40m < 400 → m < 10.
Why the other answers are wrong
- B. m ≤ 10
- At m = 10 the two options cost the same.
- C. m > 10
- Beyond 10 months the yearly fee is cheaper.
- D. m < 40
- 40 is the monthly price, not a number of months.
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