What is 5^-2=5^x+4 and what is this equation and the answer because I am desperate because I need help

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost

If g^-1(x) is the inverse of g (x) which statement must be true