Question

Ingrid and Giovanni each ordered 3 computer games online that cost the same amount. Ingrid used a coupon for $10 off, and Giovanni used a coupon for 8% off. The expression shown below represents the difference between Ingrid’s total cost in dollars and Giovanni’s total cost in dollars.


What is the value of the expression when x = 20?


10.92


14.80


7.60


5.20

Notes

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Answer 1

Let each game cost x. Ingrid pays 3x − 10. Giovanni pays 3x(0.92) = 2.76x.

For x = 20:
- Ingrid: 3(20) − 10 = 60 − 10 = 50
- Giovanni: 2.76(20) = 55.20

The difference is 55.20 − 50 = 5.20.

Answer: 5.20.