1. Physics
2. Mathematical Physics
3. 8441

Three point masses are located in an x,y plane as follows:

M1= 7 kg, at (x1, y1)= (5, 6);
M2= 8 kg, at (x2, y2)= (-4, 6); and
M3= 9 kg, at (x3, y3)= (3, -2).

Find the coordinates (xcm, ycm) of the c.m. of the system.