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11 October, 07:40

the perimeter of a triangle is 12b+5. Two sides have the following length:4b and 3b+15. What is the length of the third side?

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  1. 11 October, 07:44
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    Answer:The length of the third side 2.5.

    Step-by-step explanation:

    We already know the length of two side but we don't know the length of one side so we will represent it by b and we know they three lengths add up to 12b+5.

    4b + 3b+15 + b = 12b + 5

    Solve for b.

    8b + 15=12b + 5

    -8b - 8b

    15+4b + 5

    -5 - 5

    4b/4=10/4

    B=2.5

    So the length of the third side is 2.5

    4 (2.5) + 3 (2.5) + 15+2.5=12 (2.5) + 5

    35=35
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