Geometry geometry geometry

Which of the following pairs of functions are inverses of each other? o a. f(x)=x72+8 and 96-9 = 7/x+2) =8 o b. f(x)= 6(x - 2)+3 and g(x) - *#2-3 o c. $4) = 5(2)-3 and 90- 4*: 73 o d. f(x) = 6)-12 and 910 – +12

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)