SOLUTION: What is the answer for 9, 15, & b?

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Question 304221: What is the answer for 9, 15, & b?
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
15 is higher then 9 so 15=c and 9=a
a%5E2%2Bb%5E2=c%5E2
9%5E2%2Bb%5E2=15%5E2
81%2Bb%5E2=225
b%5E2=225-81
b%5E2=144
sqrt%28b%5E2%29=sqrt%28144%29
b=12