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OpenStudy (anonymous):
.The sales tax in one state is 7%. Write a function rule for finding the total cost of an item with selling price x. Then find the total cost of a CD player with a selling price of $150. f(x) = x – 7; $148.93 f(x ) = 0.07x; $10.50 f(x ) = 7 + x; $151.07 f(x ) = 1.07x; $160.50
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