What is equivalent to 8x-y+3x

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?

What is x3+3x2−16x−48 divided by x−1?

Aphrase is shown read the phrase and give me the answer