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Mathematics, 22.06.2019 19:00 icantspeakengles

The function f(x) = 2.15(2x^2-4x-6) models the cost, in dollars, of a rug with width x feet. what is the cost of a rug that is 9 feet wide?

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The function f(x) = 2.15(2x^2-4x-6) models the cost, in dollars, of a rug with width x feet. what is...
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