Verified answer

It is better to write it so: f(g(x))

Now to find it, first put g(x) inside and get f(6x) ... now see what f does... it multiply by 5 and subtract 26 ... then f(6x) = 5[(6x)} -26 = 30x - 26 OK

(f(g(x)) means take g(x) and replace g(x) with x in f(x).

f(g(x)) = 5(6x) - 26

Simplify: f(g(x)) = 30x - 26