Calculating Velocity After Car-Truck Collision

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To calculate the original velocity of the car before the collision, the conservation of momentum principle must be applied in both horizontal and vertical directions. After the collision, the combined mass of the car and truck moves at an angle of 63.1 degrees with a shared velocity. The horizontal and vertical momentum components should be resolved to set up equations based on the initial and final momentum. By solving these equations, the original velocity of the car can be determined. This approach effectively utilizes the conservation of momentum to find the unknown velocity.
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A 568.6 kg car travels with a velocity the positive horizontal direction. A 997.8 kg truck travels at 11.5 m/s in the positive vertical direction. The two cars collide and both travel at an angle of 63.1 degrees above the positive x-axis at the same velocity. What is the original velocity (in m/s) of the car before it hits the truck?

If some one can give me a hint to start it that would be awesome!
 
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Resolve the final momentum of the car and truck into horizontal and vertical components and then use conservation of momentum for both the vertical direction and the horizontal direction.
 

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