SOLUTION: John is twice as as old as mary.If sum of sqeare of their ages is 125,find mary age.

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Question 951138: John is twice as as old as mary.If sum of sqeare of their ages is 125,find mary age.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
J=2M
J%5E2%2BM%5E2=125
Substituting,
%282M%29%5E2%2BM%5E2=125
4M%5E2%2BM%5E2=125
5M%5E2=125
M%5E2=25
M=5
So then,
J=2%285%29
J=10