Solve the system of equations by the addition method. -3+y=15
-4-y=-1

A.
The solution is
nothing. (Simplify your answer. Type an ordered pair.)
B.
There are infinitely many solutions.
C.
There is no solution

1

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?