Help. Please and thank you

Anthony and Sissy are participating in the "Roll-a-Rama" rollerskating dance championship. While 75.0-kg Anthony rollerskates backwards at 3.0 m/s, 60.0-kg Sissy jumps into his arms with a velocity of 5.0m/s in the same direction.

a.) How fast does the pair roll backwards together.

Given
m=75.0-kg for Anthony

m=60.0-kg for Sissy

V1i=3.0m/s for Anthony

V2i=5.0m/s for Sissy

V1 and 2f= 0m/s (?)

I'm not sure of the Unknown....

I know that you can multiply the kg and velocity to get the fina the final velocity, but I'm not sure if thats what should be done to solve the problem and give what they ask. If anyone can help me I would greatly appreciate it, thank you. ^^

@.@ Aeon should answer this question...now where is he...?

I just threw away my notebooks on this too...(>_<)

They still name people Sissy?
Oh well.

Well I don't take Physic till next year..so uh I can't help.

It's okat Sadira, any help would be appreciated. any.

but wouldn't you multiply the velocity by the kg? or add the kg and velocity first with the like terms then do so?

My guess is...
Do the normal processs to find the Velocities and add the two of them

try this:

60.0 plus 75.0= 135 kg
5.0 plus 3.0= 8 m/s

that would be 1080, but I'm not sure what to do with it either. >.<

I don't think the number should be that big. it says how fast, so the answer should be in m/s right?

Wait a sec...This isn't asking for acceleration is it? *confuzzled from rereading this over and over*

I was confused with what it was asking for too....please, can you give your ideas, mine might not be right.