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14-12-2016
Mathematics

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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.

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nobillionaireNobley nobillionaireNobley

16-12-2016

y is the original priceof the DVD.
Price after discount = (1 - 0.15)y = 0.85y
Price after sales tax = (1 + 0.05)0.85y = 1.05(0.85y) = 0.8925y

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