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blagie [28]
3 years ago
15

Dominic, Ralf and Peter have just eaten a HUGE Christmas meal. Dominic now weighs half as much as Ralf, and Peter weighs three t

imes as much as Dominic. Together they weigh 720 pounds. How much does Dominic weigh?
Mathematics
2 answers:
maks197457 [2]3 years ago
8 0
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.
notsponge [240]3 years ago
8 0
Dominic is 120 pound's, Ralf is 240 pound's, and Peter is 360 pound's. (I know you only asked for Dominic but i felt like giving you the other's to).:3 
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