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Jamie purchased a DVD that was on sale for 15% off. The sales tax in her county is 5%. Let y represent the original price of the DVD. Write an expression that can be used to determine the final cost of the DVD.

Sunrisesk8r  Jun 4, 2017
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Since the DVD has 15% off its original price, then that means:

100% - 15% =85% which is the sale price you pay,

Since the original price was "y", then:

85%y + 5% sales tax =The final sale price, or

0.85y + 0.05(0.85y) =The final sale price.

Guest Jun 4, 2017
edited by Guest  Jun 4, 2017

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