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Brooke2013
 2 years ago
Let f(x) = 4 + 5x and g(x) = 2x  1. Find f(g(x)) and g(f(x))
Choices:)
A.) f(g(x)) = 10x  1; g(f(x)) = 10x + 7
B.) f(g(x)) = 7x + 3; g(f(x)) = 10x + 7
C.) f(g(x)) = 7x  3; g(f(x)) = 10x + 7
D.) f(g(x)) = 10x  7; g(f(x)) = 7x + 3
Brooke2013
 2 years ago
Let f(x) = 4 + 5x and g(x) = 2x  1. Find f(g(x)) and g(f(x)) Choices:) A.) f(g(x)) = 10x  1; g(f(x)) = 10x + 7 B.) f(g(x)) = 7x + 3; g(f(x)) = 10x + 7 C.) f(g(x)) = 7x  3; g(f(x)) = 10x + 7 D.) f(g(x)) = 10x  7; g(f(x)) = 7x + 3

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zepdrix
 2 years ago
Best ResponseYou've already chosen the best response.1Understand the pattern? It's important to get comfortable with function notation c:

gursu
 2 years ago
Best ResponseYou've already chosen the best response.0When you want to find f(g(x)) you take the g(x) function and plug it in for every x value in function f(x). So, f(g(x)) will be 4+5(2x1)=4+10x5=10x1. You do the same thing for g(f(x)) and you will find 10x+7
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