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Mathematics 30 Online
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. a. f(x) = x – 7; $148.93 b. f(x ) = 0.07x; $10.50 c. f(x ) = 7 + x; $151.07 d. f(x ) = 1.07x; $160.50

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