Determine the direction of opening, zeroes, axis of symmetry, optimal value, vertex and y-intercept for each of the following quadratic relations.
y = 0.5(x + 2)(x + 10)

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

W-16=-12 solve each one step equation plz