Write an expression in simplest form that represents the earnings for washing and waxing x cars and y trucks

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.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?