answered by **Guest**

To be able to calculate the problem above, we need to set up equations. We let,

D = Dominic weight

R = Ralph weight

P = Peter weight

We have three unknowns so we should set up three equations. We do as follows:

D = 0.5R

P = 3D

D+R+P = 720

Solving simultaneously we obtain,

D = 120

R = 240

P = 360

Therefore, Dominic weighs 120 mass units.

If not sure about the answer, try using the search to find other answers in the subject Mathematics or ask your question yourself.

See other answers