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Sophia.13

  • 3 years ago

METALS WILL BE GIVEN. Solve. Show all your work and explain your steps. the triagle on the left has a perimeter of 14. the triangle on the right has a perimeter of 21. what are x & y ?

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  1. Sophia.13
    • 3 years ago
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    |dw:1358200074670:dw|

  2. CalebBeavers
    • 3 years ago
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    Hmmm. So perimeter is all sides added together, can you write an equation for the perimeter of the first one?

  3. Sophia.13
    • 3 years ago
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    p = 2y + 1x is that right?

  4. CalebBeavers
    • 3 years ago
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    Yep but you know the perimeter so go ahead and put that in to x+2y=14 now the second one

  5. Sophia.13
    • 3 years ago
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    3x + 5/4y = 21 is that right?

  6. CalebBeavers
    • 3 years ago
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    Forgot a side 3x+(5/4)y+(5/4)y=21 which simplifies to 3x+(5/2)y=21 so now we have two equations 3x+(5/2)y=21 x+2y=14 any idea how to solve?

  7. Sophia.13
    • 3 years ago
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    We could use the elimination process right?

  8. CalebBeavers
    • 3 years ago
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    You could. Multiply the second equation by -3 and then add the two equations together

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