A new type of pump can drain a certain pool in 6 hours. an older pump can drain the pool in 9 hours. how long will it take both pumps working together to drain the pool?

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

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?