SOLUTION: how does it come out to be y+20=29 and the answer is y=square root 441=21 m

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Question 874124: how does it come out to be
y+20=29 and the answer is y=square root 441=21 m
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
I think you mean y^2 + 20^2 = 29^2 (otherwise, y = 9, according to what you typed).

If y^2 = 20^2 = 29^2, then y^2 = 29^2 - 20^2 = 841-400 = 441, and y = +/- 21. In the context of a geometry problem or any problem involving physical lengths, y would equal +21.