AlgebraEasy–MediumRemaining amount from a linear model
Algebra practice question
A prepaid card holds $900 and is charged $60 each month. How many dollars remain after 12 months?
Answer: 180
900 − 60 × 12 = 900 − 720 = 180.
Common wrong answers
- If you answered 15
- 15 is 900/60, the number of months the card would last.
- If you answered 720
- 720 is the amount SPENT.
- If you answered 840
- 840 subtracts one month only.
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