Question

A triangle has side lengths of ( 1.3 t + 7.9 u ) (1.3t+7.9u) centimeters, ( 2.4 t − 4.8 v ) (2.4t−4.8v) centimeters, and ( 6.8 v − 9.8 u ) (6.8v−9.8u) centimeters. Which expression represents the perimeter, in centimeters, of the triangle?

Answer 1

Explanation:

why did you mention the definition of every side twice ?

I think we need only one per side right ?

because otherwise we would have to do all 3 multiplications before summing things up.

I sorted the terms for the sum based on their variable.

after all, the perimeter of a triangle is the sum of all 3 sides.

1.3t + 7.9u

2.4t - 4.8v

- 9.8u +6.8v

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3.7t - 1.9u + 2v cm