MathLab with Mr. Ahmed

MathLab with Mr. Ahmed is a math learning website by Ahmed Amasha, a mathematics teacher teaching the American curriculum. Explore Algebra 2, Precalculus, Calculus, and SAT and PSAT Math Prep through lessons, focused practice and printable resources.

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Function notation and composition

Question 1 of 3

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The function ff is defined by f(x)=x+1f(x) = x + 1. The function gg is defined by g(x)=f(x)+9g(x) = f(x) + 9. What is the value of g(2)g(2)?
Worked example
g(2)=f(2)+9=(3)+9=12g(2) = f(2) + 9 = (3) + 9 = 12.
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The function ff is defined by f(x)=2x+1f(x) = 2x + 1. The function gg is defined by g(x)=f(x)+7g(x) = f(x) + 7. What is the value of g(−2)g(-2)?