Answer by Edwin McCravy(20055)   (Show Source): You can put this solution on YOUR website!
 
Given that f(x) = 2x + 1 and g(x) = -5x + 2, solve for f(g(x)) when x = 3.

That means f(g(3)).  Substitute 3 for x in g(x) = -5x + 2, then take what
you get and substitute that for x in f(x). 


f(x) = 2x + 1 and g(x) = -5x + 2.

First find g(3) by substituting x=3 in g(x) = -5x + 2
                                       g(3) = -5(3) + 2
                                       g(3) = -15 + 2
                                       g(3) = -13

Then substitute x=-13 in f(x) = 2x + 1
                       f(-13) = 2(-13)+1
                       f(-13) = -26+1
                       f(-13) = -25 

Edwin
  

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