Which of the following expressions are equivalent to m/n^7? a. -mn^7 b. mn^-7 c. -m/n^7 d. -m/n^-7

What is the probability of rolling a single die greater than 4

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 result of adding the system of equations? 2x+y=4 3x-y=6