17/3 divided by 2/3 help please!:))

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 the prime factorization of 23 ?me with this question

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers