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The function f(x)=2.5(2x2-4x-6) models the cost, in dollars, of a rug with the width x feet. What is the cost of a rug that is 9 feet wide?
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5 votes
The function f(x)=2.5(2x2-4x-6) models the cost, in dollars, of a rug with the width x feet. What is the cost of a rug that is 9 feet wide?

User Ram Hemasri
by
8.1k points

1 Answer

5 votes

Answer:

300 dollars

Explanation:


f(x)=2.5(2x^2-4x-6)\\x = 9\\f(9)=2.5(2(9)^2-4(9)-6)\\f(9) = 300

User Dhruv Raval
by
8.6k points
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