Ineed solving these problems. i know i'm asking a lot but can anyone can do it step by step (in detail)

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

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?

Identify the polynomial. a2b - cd3 a. monomial b. binomial c. trinomial d. four-term polynomial e. five-term polynomial