Question 111213
QUESTION -- ARE THESE PLANES FLYING DUE WEST & DUE EAST?
IF NOT -- WHAT IS THE ANGLE BETWEEN THEIR FLIGHT PATHS?
THIS INFORMATION WOULD HELP DETERMINE HOE TO SOLVE THIS PROBLEM. 
IF THEY ARE ON OPOSITE (180 DEGREE) FLIGHT PATHS THEN:
X+(X+25)=575
2X+25=575
2X=575-25
2X=550
X=550/2
X=275 MPH FOR THE SLOWER PLANE.
275+25=300MPH FOR THE FASTER PLANE.
PROOF
275+300=575
575=575