Combine like terms in (3x+5)+(4x-30

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?

Find the value of x that will make l ll m

How do you determine whether a relationship represented as as graph is linear or nonlinear