The answer is y^-1 :) when you have two exponents over a y in a fraction or divison, you always subtract the top from the bottom. hope this helps!
.531 is the answer to the problem

First, you subtract 28 from 100 then divide that by 12 which would give you 6. so, X>6
F(F(x)) = (x -5) -5 = x -10
G(F(x)) = (x -5)² . . . . . . . matches selection A.