Question

A triangle has side lengths of (2t – 4) centimeters, (7t – 2) centimeters, and (2u+7) centimeters. Which expression represents the perimeter, in centimeters, of the triangle?​

Answers

  1. Answer:
    9t + 2u + 1
    Step-by-step explanation:
    You are combining your like terms.
    You have:
    2t + 7t = 9t
    You have:
    Only 2u and no other u terms
    You have:
    -4 + (-2) + 7 = +1
    Combine that all together and you have your answer.

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  2. Answer:
    Perimeter = 11t + 1
    Step-by-step explanation:
    Perimeter of a triangle = lenght of side 1 + lenght of side 2 + lenght of side 3
    Then:
    perimeter = (2t-4) + (7t-2) + (2t+7)
    perimeter = 2t + 7t + 2t + 7 – 2 – 4
    perimeter = 11t + 1

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