Question 130558
3,600/(X+100)=2,400/(X-100) CROSS MULTIPLY.
2,400(X+100)=3,600(X-100)
2,400X+240,000=3,600X-360,000
1,200X-3,600X=-360,000-240,000
-1,200X=-600,000
X=-600,000/-1,200
X=500 MPH FOR THE JET IN STILL AIR.
PROOF:
3,600/600=2,400/400
6=6