What is value of question mark the polynomial between perfect square?
x2+26+?

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?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

What is the value of x in the following equation? -3x-2=2x+8