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Falling_In_Katt

  • one year ago

***WILL MEDAL*** The perimeter of a triangle is 7a - 11b. If two of its sides are 2a + b and a - 9b, what is the third side?

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  1. anonymous
    • one year ago
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    To find the perimeter you add up all the sides of the triangle

  2. anonymous
    • one year ago
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    we'll us x to represent the missing side

  3. anonymous
    • one year ago
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    (2a+b) + (a-9b) + x = 7a-11b

  4. anonymous
    • one year ago
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    now just simplify the equation and solve for x

  5. anonymous
    • one year ago
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    Do you know how to do that?

  6. anonymous
    • one year ago
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    first add all the like terms on the left side

  7. anonymous
    • one year ago
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    3a - 8b + x = 7a-11b

  8. anonymous
    • one year ago
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    now move the a and b terms to the right side of the equation to get x by itself

  9. anonymous
    • one year ago
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    x = 4a - 3b

  10. anonymous
    • one year ago
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    This means that the missing side is 4a - 3b

  11. Falling_In_Katt
    • one year ago
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    Ohhhhh that makes since .

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