in the figure below, lines a and b are straight and parallel to each other, which angles must be congruent to<1

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?

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

What are the solutions of the equation? 5z^2 + 9z - 2 = 0 a. 1, -2 b. 1, 2 c. 1/5, -2 d. 1/5, 2