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anonymous

  • one year ago

For what values of x and y are the triangles congruent? Give me a minute to draw the triangles.

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  1. anonymous
    • one year ago
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    |dw:1434509034342:dw|

  2. anonymous
    • one year ago
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    |dw:1434509958514:dw|

  3. anonymous
    • one year ago
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    4y do I add or subtract the eights

  4. anonymous
    • one year ago
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    add

  5. anonymous
    • one year ago
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    4y =18

  6. anonymous
    • one year ago
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    4y=16

  7. anonymous
    • one year ago
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    yes 16, so y is?

  8. anonymous
    • one year ago
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    4

  9. anonymous
    • one year ago
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    right. The next equation is \[5x-5y=2y+7\] plug in 4 for y and solve for x

  10. anonymous
    • one year ago
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    So I set up as 5x-5y(4)=2(4)+7

  11. anonymous
    • one year ago
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    yeah, just leave out the y on the left 5x-5(4)=2(4)+7

  12. anonymous
    • one year ago
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    ok

  13. anonymous
    • one year ago
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    5x-20=8-7

  14. anonymous
    • one year ago
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    8+7 on the right

  15. anonymous
    • one year ago
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    ok 5x-20=15

  16. anonymous
    • one year ago
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    yes

  17. anonymous
    • one year ago
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    now do I subtract 15x from 20

  18. anonymous
    • one year ago
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    add 20 to both sides so you have the x isolated on one side and numbers on the other side

  19. anonymous
    • one year ago
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    Do I add 20 to 20 or 5, and 20 to 15

  20. anonymous
    • one year ago
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    to 15|dw:1434511201361:dw|

  21. anonymous
    • one year ago
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    the answer selection is x=-4,y=-4 x=-4,y=4 x=4,y=7 x=7,y=4

  22. anonymous
    • one year ago
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    so choice #3 would be the answer

  23. anonymous
    • one year ago
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    look at the equations we solved. We got y = 4 and x = 7

  24. anonymous
    • one year ago
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    ok, got you thanks for helping

  25. anonymous
    • one year ago
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    you're welcome

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spraguer (Moderator)
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