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anonymous

  • one year ago

Which is the solution of the system? A. (-4,2) B. (-3,1) C. (-3,-5) D. (4,-6)

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  1. anonymous
    • one year ago
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    |dw:1435437755769:dw|

  2. anonymous
    • one year ago
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    do i use distributive property???

  3. Astrophysics
    • one year ago
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    I don't really know what your question is asking

  4. anonymous
    • one year ago
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    yeah nvm i understand it now that i really look at it..its all good

  5. Astrophysics
    • one year ago
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    \[\frac{ (x+y) }{ (2x-3y) } = -\frac{ 2 }{ 9 }\] is the problem this?

  6. Astrophysics
    • one year ago
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    Can you just take a picture of it and upload it

  7. anonymous
    • one year ago
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  8. Astrophysics
    • one year ago
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    Oh, that makes sense, they are two different equations right?

  9. Astrophysics
    • one year ago
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    Yeah!

  10. anonymous
    • one year ago
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    so basically i just use distributive property?

  11. Astrophysics
    • one year ago
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    Ok so you have two equations, \[x+y=-2\] \[2x-3y=-9\] No not quite, so does it ask for any methods, like elimination, substitution, matrices?

  12. anonymous
    • one year ago
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    it asks what the solution is

  13. Astrophysics
    • one year ago
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    Ok, we can use any method then

  14. anonymous
    • one year ago
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    im gonna give you a medal just cuz youve been the most help ive had since ive gotten on here

  15. Astrophysics
    • one year ago
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    Lets use substitution, so to do this problem, we want to isolate one of the variables in one of the equations and plug it into the second equation, that will help us find the x value and then we can go back and find the y value. We could also take your options in to our advantage and do it the lazy way but I don't think you will learn that way.

  16. Astrophysics
    • one year ago
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    Ok I think drawing it out will make more sense, first you want to label the equations

  17. anonymous
    • one year ago
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    Did you read what i said?

  18. Astrophysics
    • one year ago
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    |dw:1435438438884:dw| Hey, yes I did thanks :) So lets do this problem now, pick one of the equations and one of the variables to isolate in that equation.

  19. anonymous
    • one year ago
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    2

  20. Astrophysics
    • one year ago
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    Haha, actually lets pick one as it's a bit more simple to deal with it

  21. anonymous
    • one year ago
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    ok 1 it is

  22. Astrophysics
    • one year ago
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    Now lets say we solve for x

  23. Astrophysics
    • one year ago
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    |dw:1435438607278:dw| so far so good?

  24. anonymous
    • one year ago
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    yerp

  25. Astrophysics
    • one year ago
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    Ok great, now we want to take this expression and plug it into the second equation, as such |dw:1435438692346:dw| notice how we have removed x from the equation now we can simply solve for the y!

  26. Astrophysics
    • one year ago
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    Could you try solving for y? Don't worry about making mistakes long as you're attempting that's awesome.

  27. anonymous
    • one year ago
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    |dw:1435438790521:dw|

  28. anonymous
    • one year ago
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    is that right???????

  29. Astrophysics
    • one year ago
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    Yes, it's being multiplied so you have to distribute

  30. anonymous
    • one year ago
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    |dw:1435438885781:dw|

  31. anonymous
    • one year ago
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    ill brb i gotta get something..it might be a few minutes...plzzz wait

  32. Astrophysics
    • one year ago
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    Not quite, |dw:1435438982368:dw| does that make sense?

  33. anonymous
    • one year ago
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    yes sorry for the wait lol

  34. Astrophysics
    • one year ago
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    It's ok

  35. Astrophysics
    • one year ago
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    Now you want to simplify it, collect like terms and solve for y

  36. anonymous
    • one year ago
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    would it be 2-3y or -2-3y?????

  37. Astrophysics
    • one year ago
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    I'm not sure what you mean but |dw:1435439329301:dw| so y will be?

  38. anonymous
    • one year ago
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    it is -2-3y i got -9=-9

  39. anonymous
    • one year ago
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    whhhaaaatt

  40. anonymous
    • one year ago
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    ooohhhi did that all wrong i got that now lmao

  41. Astrophysics
    • one year ago
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    Ok :), now just solve for y? One step needed

  42. anonymous
    • one year ago
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    soo the only answer with y=1 is b...would that be the answer?

  43. Astrophysics
    • one year ago
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    Yes, y = 1, but you should make sure to check with x just in case you did not make any mistakes, lets take equation 1 and plug y in it.

  44. Astrophysics
    • one year ago
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    |dw:1435439549600:dw| so our solution is (-3,1) yup!

  45. anonymous
    • one year ago
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    yayyy its right..thank you so much.. =^w^=

  46. Astrophysics
    • one year ago
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    Np :)

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