What is the value of the angle marked with x?

What is the value of the discrimination for the quadratic equation 0=×2+2+×2

Ofin . (2,4) (2,1) a. y= 2 b. x= 2 c. x= -2 d. y= 2x

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?