SOLUTION: Let f(x)=x^2+x and g(x)=2x+1. Find and simplify the following expressions: f(4) (f0g)(2)

Algebra ->  Test -> SOLUTION: Let f(x)=x^2+x and g(x)=2x+1. Find and simplify the following expressions: f(4) (f0g)(2)      Log On


   

Question 669683: Let f(x)=x^2+x and g(x)=2x+1. Find and simplify the following expressions:
f(4)
(f0g)(2)
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
Using
f(x) = x^2 + x
g(x) = 2x + 1
...
f(4) = 4^2 + 4
= 16 + 4
f(4) = highlight_green%2820%29
...
(fog)(2)
g(2) = 2(2) + 1
= 4 + 1
= 5
(fog)(2) = 5^2 + 5
= 25 + 5
(fog)(2) = highlight_green%2830%29
.....................
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