Houa used a discount coupon for 10% off at her favorite clothing store. She bought 7 pairs of sunglasses for xx dollars each and 2 belts for yy dollars each. Which expression represents the total amount Houa paid after the coupon was applied?

Answer 1

To find the total amount Houa paid after applying the 10% discount coupon, we first need to calculate the total cost of the items before the discount and then apply the discount.

1. Calculate total cost before discount:

   • Cost of 7 pairs of sunglasses: \( 7 \times xx = 7xx \)
   • Cost of 2 belts: \( 2 \times yy = 2yy \)
   • Total cost before discount: \( 7xx + 2yy \)

2. Apply the 10% discount:

   • A 10% discount means she pays 90% of the total cost.
   • The amount she pays after applying the discount is given by: \[ \text{Total amount after discount} = (7xx + 2yy) \times (1 - 0.10) = (7xx + 2yy) \times 0.90 \]

Thus, the expression that represents the total amount Houa paid after the coupon was applied is: \[ 0.90(7xx + 2yy) \]