college algebra
posted by missy .
given f(x)=4x5, g(x)= x+5 over 4 Find (fog)(x). are these inverse functions?

college algebra 
Reiny
(fog)(x)
= f(g(x))
= f( (x+5)/4)
= 4(x+5)/4  5
= x+55 = x
so , yes, they are inverses of each other
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