I think the answer is 599 m/s but i’m not sure

Explanation:

they are running directly at each other

p = m*v

where p is momentum

m is mass

and v is velocity ( physics term for speed and direction )

player A )  80 * 8 = 640

player B ) 100 * - 5.5 = - 550

A +B = total momentum

640- 550 = 90

total mass is now player A  + player B= 180

90 = 180 * v

90/ 180 = v

0.5 = v

they are moving to the right of the picture at  0.5 m/s  

the answer would be   dignified - apex