Whixh is x and y please help asap!!​

Factor this polynomial completely x^2-64

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

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?