Asked by jake

The lengths of the sides of a triangle are in the ratio 3 : 7 : 5. The perimeter of the triangle is 90 inches. What is the length of the largest side
Answered by mathhelper
let the sides be 3x, 7x, and 5x. Then
3x+7x+5x = 90

solve for x, sub into my definitions for the longest side.
Answered by oobleck
2(3x+7x+5x) = 90
Answered by oobleck
oops. my bad. I was thinking of a rectangle and hit submit before I saw that there were <u>three</u> sides!
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