Inertia of Momentum: Initial CG Y Coordinate

[Krobinson2851]

Homework Statement

Given: A flat dance floor of dimensions lx = 17mbyly =15mandhasamassofM = 1100 kg. Use the bottom left corner of the dance floor as the origin. Three dance couples, each of mass m = 100 kg start in the top left, top right, and bottom left corners.
What is the initial y coordinate of the cen- ter of gravity of the dance floor and three couples?
Answer in units of m

Homework Equations

xcm: m1x1 + m2x2/m1+m2

The Attempt at a Solution

I am so lost any help would be appreciated! Thanks

 

[ap123]

Hello Krobinson2851

Why don't you just apply the equation you have written down (and the equivalent one for y_CM).
If you get stuck, show us what you've done.