A jacket is on sale for 15 dollars off. As part of a one-day sale, a 20 percent discount is applied to all purchases. If x represents the original price of the jacket, which expression represents the final price of the jacket during this sale?

First subtract the $15 markdown from the original price, giving x − 15. The 20% discount means the customer pays 80% of that amount: 0.8(x − 15) = 0.8x − 12. Therefore, the final price is represented by choice A, 0.8x − 12.

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