If an elephant, running 8.0 m/s ran into a fly that was stationary, what would be the final velocity of the fly and the elephant after the collision?

nah.   i'm just sleepy.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

answer///isobars;