Answer:
33
Step-by-step explanation:
First, if you needed help with this f(x) or anything replacing x means you replace it in the formula. So for here, f(x)=4x. That mean f(y)=4y, or f(2)=4*2=8 and f(abc)=4abc. So you just replace.
The question is asking for h(6) so let's step by step plug in the formulas.
h(6)
2f(6) - 3g(6+3)
2f(6) - 3g(9)
2(4*6) - 3(9-4)
2*24 - 3*5
48 - 15
33