<PRE><B>Question 799778</B>
we are forming  a right triangle with the hypotenuse the distance apart of the boats.
the time is 2 hours
2*(x+3) distance of the eastbound boat 
2x distance of the southbound boat
(2x)^2+ (2x+6)^2=30^2
4x^2+4x^2+24x+36=900
8x^2+24x+36 = 900
8x^2+24x-864 = 0
x=9 speed of the south bound boat




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