Question 439504: a triangle sides 2y, 6y, and y + 7. what is the perimeter of the triangle when y=3?
Answer by richard1234(7193)   (Show Source):
You can put this solution on YOUR website! The problem is flawed. Normally, the perimeter would be 2y + 6y + (y+7) = 9y + 7 = 27 + 7 = 34, but if you substitute y first, you obtain a "triangle" with sides 6, 18, and 10. This is not a triangle, because 6 + 10 < 18, which violates the triangle inequality.
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