Given a quadratic function, f(x) = ax 2 + bx + c has a positive leading coefficient and the vertex that has a y-coordinate of zero. determine the number of real zeros of the function.

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

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?

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.