Select all that justify the following statement.

2 • = 1

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.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.