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30 March, 16:15

The lengths of sides of a triangle are (3x+2), (2x+5), and 4x. Terrel correctly added the lengths of the three sides to find the perimeter. What expression did Terrel write for perimeter?

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  1. 30 March, 17:02
    0
    So permiter=masure of all sides added together

    so sides are (3x+2), (2x+5), and (4x)

    so (3x+2) + (2x+5) + (4x)

    use associative property

    a + (b+c) = (a+b) + c so

    (3x+2) + (2x+5) + (4x) = 3x+2+2x+5+4x

    group like terms becasue can move numbers around

    (3x+2x+4x) + (2+5)

    add like terms

    (9x) + (7)

    9x+7

    he will use 9x+7=perimiter
  2. 30 March, 17:51
    0
    (3x+2) + (2x+5) + 4x = 5x + 7 + 4x = 9x + 7

    Teri wrote the expression 9x + 7 for perimeter.
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