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magenxoxo

  • 2 years ago

Please helllppppp!? :D Which of the below systems of equations matches the following graph? x – 3y = 9 2x + 3y = 0 x + 3y = –9 2x + 3y = 0 x – 3y = –9 2x – 3y = 0 x + 3y = 9 2x – 3y = 0

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  1. precal
    • 2 years ago
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    you sort of need the graphs?

  2. magenxoxo
    • 2 years ago
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    I know.. i have one

  3. eclipse18
    • 2 years ago
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    Can you post a picture of the graph then I can try to help?

  4. magenxoxo
    • 2 years ago
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    yes. one sec! :)

  5. sampatho2
    • 2 years ago
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    Just take some points on the graph and substitute them in the equation. Whatever equations satisfy the point are your equations

  6. sampatho2
    • 2 years ago
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    satisfy the point in the sense which give 0 on substitution of x and y co-ordinates in the place of x and y

  7. magenxoxo
    • 2 years ago
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    I don't know how to get the graph on here :/

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  8. magenxoxo
    • 2 years ago
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    oh wait! its right there

  9. sampatho2
    • 2 years ago
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    they both intersect at (2,3) so if we substitute these equations in the above equations none satisfy so none of the equations match the graph

  10. magenxoxo
    • 2 years ago
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    hmm.... thats not one of the answers?

  11. sampatho2
    • 2 years ago
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    no

  12. magenxoxo
    • 2 years ago
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    Well, I'm confused then..

  13. jim_thompson5910
    • 2 years ago
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    The point of intersection is (3,2) not (2,3)

  14. sampatho2
    • 2 years ago
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    yeah sorry I'm wrong

  15. sampatho2
    • 2 years ago
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    in that case the last set is your answer try substituting 2 and 3 in the place of x and y

  16. magenxoxo
    • 2 years ago
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    So, would this be the answer? x – 3y = –9 2x – 3y = 0

  17. sampatho2
    • 2 years ago
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    no x+3y=9 (3+3*2=9) and 2x-3y=o (2*3-3*2=0)

  18. magenxoxo
    • 2 years ago
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    ahh. i was going to chose that one

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