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

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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