Hello I just need help solving this problem I did it but I'm not sure I did the steps right so trying to see what you get as answer so I can see if I'm missing something please show all work thank you

Due date: Tuesday 7. Two manned satellites approach one another at a relative speed of 0.250 m/s, intending to dock. The first has a mass of 4.00 x 103 kg, and the second a mass of 7.50x103 kg . If the two satellites collide elastically rather than dock, what is their final relative velocity? mv t muz = ( m, + m ) v t 4.00 * 103 ka - 7. 50 x 103 kg D. 250 m mi- mz 4:00 * 103 kq - 7.5 x103 kq v1 11 - 3. 50 x 10 3 kq 0. 250 m/ C