How many x-intercepts will the graph of y = x^2 +3x - 42 have? (Use the discriminant to
find out!)
A. 2 x-intercepts
B. no x-intercepts
C. 1 x-intercept
D. 3 x-intercepts

An incoming airplane is x miles due north from the control tower at an airport. a second incoming airplane is y miles due east of the same control tower. the shortest distance between the two airplanes is z miles. which of the following functions would best model the situation above?