Center of mass: mass's on a right triangle system

[IDKPhysics101]

A system consists of three particles located at the corners of a right triangle as shown below. Mass 1 is 7.0 kg, mass 2 is 6.4 kg, and mass 3 is 9.9 kg. If the distances a equals 15.8 m and b equals 2.0 m, then what is the center of mass (in m) in the vertical direction?

Y center of mass=.6m

I don't have time to type my work right now. But will show work if answer is wrong to see where i went wrong.

 

[tiny-tim]

A system consists of three particles located at the corners of a right triangle as shown below. Mass 1 is 7.0 kg, mass 2 is 6.4 kg, and mass 3 is 9.9 kg. If the distances a equals 15.8 m and b equals 2.0 m, then what is the center of mass (in m) in the vertical direction?

Y center of mass=.6m

seems fine