AlgebraEasy–MediumProduct of two quantities from a system
Algebra practice question
Four notebooks and one pen cost $14, and one notebook costs $1 more than one pen. What is the product of the two prices, in dollars squared?
Answer: 6
Let the pen be p: 4(p + 1) + p = 14, so 5p = 10, p = 2. The notebook is $3. Product: 6.
Common wrong answers
- If you answered 2
- 2 is the pen's price.
- If you answered 3
- 3 is the notebook's price.
- If you answered 5
- 5 is the sum of the prices.
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