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What is the composite function (fg)(x) when f(x) = 6x - 3 and g(x) = 8 - 22?

a) (fg)(x) = -140x + 66
b) (fg)(x) = -22x - 3
c) (fg)(x) = 6x - 19
d) (fg)(x) = -28x + 19

User Gunaseelan
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1 Answer

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Final answer:

To find the composite function (fg)(x) for f(x) = 6x - 3 and g(x) = 8 - 22, we simplify g(x) to -14 and then substitute into f(x) to get f(g(x)) = -87. None of the answer options given match this result.

Step-by-step explanation:

To find the composite function (fg)(x) when f(x) = 6x - 3 and g(x) = 8 - 22, we first need to evaluate g(x). The function g(x) is a constant function since it does not contain the variable x, and thus g(x) simplifies to -14 after subtracting 22 from 8. Next, we substitute g(x) into f(x) to compute the composite function. Here is how we do it step by step:

First, simplify g(x): g(x) = 8 - 22 = -14.

Next, substitute g(x) into f(x): f(g(x)) = f(-14) = 6(-14) - 3.

Then, multiply 6 by -14: 6(-14) = -84.

Finally, subtract 3: -84 - 3 = -87.

Therefore, the composite function is (fg)(x) = f(g(x)) = -87, which does not match any of the options given.

Since none of the options provided matches our calculated composite function, the question as stated does not contain the correct answer.

User Orentet
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