AlgebraEasy–MediumTotal from a starting amount and a rate
Algebra practice question
A savings jar starts with $200, and $15 is added each week. How many dollars are in the jar after 12 weeks?
Answer: 380
200 + 15 × 12 = 200 + 180 = 380.
Common wrong answers
- If you answered 180
- 180 is the amount ADDED, without the starting $200.
- If you answered 215
- 215 adds one week only.
- If you answered 2580
- 2,580 multiplies (200 + 15) by 12.
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