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Mathematics 16 Online
OpenStudy (anonymous):

The function for the cost of materials to make a shirt is f(x) = five sixths x + 5, where x is the number of shirts. The function for the selling price of those shirts is g(f(x)), where g(x) = 5x + 6. Find the selling price of 18 shirts. I did: 5/6x (5x +6) +5 = 5/6(18)[5(18)16] and came up with 15(90+6) and got 1440 which wasnt one of the choices :\ Help please?

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