Help me please I need this please​

F(x)= 1/x-4, g(x)=4x+1/x a. use composition to prove whether or not the functions are inverses of each other. b. express the domain of the compositions using interval notation.

The amount of energy it takes to lift a box might be a function of which of the following

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?