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teddygirl

PLEASE HELP/ check answer The triangle below on the left has a perimeter of 14. The triangle on the right has a perimeter of 21. What are X and Y? I have this but idk if its right x + 2y = 14 3x + 5/2y = 21 6x + 5y = 42 -6(x + 2y = 14) 6x + 5y = 42 -6x - 12y = -84 6x + 5y = 42 ------------------------ -7y = --42 y = 6 If y = 6 then x = 2 <==ANSWER

  • one year ago
  • one year ago

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  1. TheViper
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    |dw:1339692621478:dw|

    • one year ago
  2. teddygirl
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    |dw:1339692696540:dw|

    • one year ago
  3. TheViper
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    |dw:1339692765055:dw| Is it like this?

    • one year ago
  4. ganeshie8
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    correct. x=6, y = 2

    • one year ago
  5. TheViper
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    If yes then;\[\color{red}{x+2y=14.}\]\[\color{red}{3x+2(\frac{5}{4y})=21.}\]

    • one year ago
  6. TheViper
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    then u r correct:)

    • one year ago
  7. teddygirl
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    one more question.. Is that method called substitution or elimination?

    • one year ago
  8. ganeshie8
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    its other way.. x=2, y=6.

    • one year ago
  9. ganeshie8
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    elimination

    • one year ago
  10. teddygirl
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    ok thanks!

    • one year ago
  11. TheViper
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    \[\Huge{\color{red}{\text{U r welcome:)}}}\]

    • one year ago
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