Question 828291
we are dealing with right triangles here.
we don't have real number speeds just x and y.
4x is the distance traveled west by ship a
3y-100 is the distance traveled north by ship b
the distance between them is the hypotenuse
(4x)^2+(3y-100)^2=d^2
16 x^2+9 y^2-600 y+10000 = d^2