Question 1016141
f(x)=5x+4; g(x)=7x-1 and solve for (f*g)(3) I got 518 but that wasn't right

this is what I had35x²+23x-4 and when I put in 3 I got 518 but that was wrong.
-----------
It's simpler to sub 3 for x first.
f(x)=5x+4; g(x)=7x-1
f(3) = 19
g(3) = 20
--> 19*20 = 380