Question

Two football players collide head-on in midair while chasing a pass. The first player has a 100 kg mass and an initial velocity of 4.00 m/s in the positive x direction, while the second player has a 130 kg mass and initial velocity of
3.30 m/s
in the negative x direction. What is the x component of their velocity just after impact if they cling together? (Indicate the direction with the sign of your answer.)

Answer 1

I can't figure it out