AlgebraEasyEquation relating two counts with a total cost
Algebra practice question
Balloons cost $1 each and ribbons cost $3 each. Which equation shows that b balloons and r ribbons cost $15 in total?
- A. b + 3r = 15Correct
- B. 3b + r = 15
- C. b + r = 15
- D. 4(b + r) = 15
Answer: A. b + 3r = 15
$1 per balloon and $3 per ribbon.
Why the other answers are wrong
- B. 3b + r = 15
- This swaps the prices.
- C. b + r = 15
- This counts items, not dollars.
- D. 4(b + r) = 15
- This charges $4 for each item.
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