Answer: f ° g (x) = x
Explanation:
f(x) = 3x - 5
g(x) =

fg implies :
f (
)
What we have done is just to put in the value of g(x). The next thing is that we will substitute (
) for the value of x in f(x) , that is
fg(x) =3 (
) - 5
fg(x) = x + 5 - 5
fg(x) = x