Inelastic Collision homework problem

[court2011]

Homework Statement

Two 75.0 kg hockey players skating at 6.15 m/s collide and stick together. If the angle between their initial directions was 130°, what is their speed after the collision? (Let the motion of player 1 be in the positive x-direction and the motion of player 2 be at an angle of 130° measured counterclockwise from the positive x-axis.)

Homework Equations

The Attempt at a Solution

 

[Jebus_Chris]

Draw a picture and apply the conservation of momentum.