Solve for y i have no idea what it is i feel so stupid i don’t know anything about math i’m so dumb someone me

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?

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days

If you have the following equation, 2/3x+5/6-x=2-3/4x what would you multiply each term by to get rid of all the fractions