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Precalculus

Course: Precalculus > Unit 1

Lesson 1: Composing functions
Math
Precalculus
Composite and inverse functions
Composing functions
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Evaluate composite functions

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Problem

Given:
g(x)=3x−2h(x)=9x
Danielle tried to evaluate (g∘h)(7), but she made a mistake. Here is her work.
Step 1g(7)=37−2=35Step 2h(7)=9(7)=63Step 3(g∘h)(7)=35⋅63=1895
What is the mistake in Danielle's work?
Choose 1 answer:
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