3 years ago

The perimeter of the triangle shown on the right is 113 feet.

1 answer:

6 0

Perimeter = sum of all sides
2x + 9x - 7 + x = 113
Combine like terms
12x - 7 = 113
12x = 120, x = 10
Plug in 10 for x for each side
2(10) = 20 feet
9(10) - 7 = 83 feet
x = 10 feet
The lengths of the sides are 20, 83, 10 feet

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