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At a local music store CDs cost 11.99including tax is the number of CDs purchased proportional to the cost of the CDs

2 answers

n + .08n = 11.99 tax = 8%
1.08 n = 11.99

11.10=n tax is .89

lets say the is 6%

11.31 = n tax is .68

they are proportional. The proportion is the tax.

try dividing the tax by the n in each case to see that the answer is the sales tax we used.
At a local music store CDs cost 11.99including tax is the number of CDs purchased proportional to the cost of the CDs What is the cost of 3 CDs
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