If f(x)= 40x- 20 Find f(4)

Chikae Y. answered • 01/12/23

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f(4) means that you're substituting x = 4 into the equation for f(x).

So since f(x) = 40x - 20, f(4) = 40(4) - 20 = 160 - 20 = 140.

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