Which set of ordered pairs represents y as a function of x??

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

The distributive property allows you to say that 3(x − 1) = 3x −