Answer:
you can watch YT videos or search online. search: How to solve proofs. Also search up proof theorems. This will help you even more towards solving more complex proof problems.
Step-by-step explanation:
G(x)=9
f(g(x))= 9(2)+9+2=29
D, because 1/4 is equivalent to 4/12 and 7/12+4/12=11/12 which is equivalent to 5/6