Homework Help?
jill bought a tennis racket for 31.50 and also a can of tennis balls. the clerk gave her 10% off. the sales tax is 5%. her bill was $34.02. what was the price of the tennis racket and tennis balls before the discount? what was the price of the tennis balls before the discount? plz help!
Tags: Help, Homework
[(31.50 + b)*.9]*1.05 = 34.02
28.35 + .9b ) 1.05 = 34.02
29.77 + .945b = 34.02
.945b = 34.02 - 29.77
.945b = 4.25
b = 4.25 / .945
b = 4.497 = 4.50
Balls cost 4.50 before discount. This is assuming we pay tax on the discounted price. If we had to pay tax on the amount before the discount then we’d get a different answer.
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Check it
31.50 + 4.50 = 36.00
So take 10% off and we get
36.00 * .9 = 32.40
Add 5% sales tax we get
32.40 * 1.05 = 34.02 .. Correct
God I Hate math!