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What is the value of (g o f)(-6)

F(x)=2x+7; g(x)=3x+12

What is the value of (g o f)(-6) F(x)=2x+7; g(x)=3x+12-example-1

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Answer:

(g o f)(-6) = -3

Explanation:

f(x)=2x+7; g(x)=3x+12

(g o f)(-6) = g(f(-6))

but f(-5) = 2(-6)+7 = -5

(g o f)(-6) = g(f(-6)) = g(-5) = 3(-5)+12 = - 3