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anonymous

  • one year ago

Write An Equation Of Each Line In Standard Form With Integer Coefficient 1.Y=1/2X-2 2.Y=-7X-9 *DIFFERENT PROBLEMS *

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  1. anonymous
    • one year ago
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    1. 2=1/2x-y (I think? I'm not positive.)

  2. anonymous
    • one year ago
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    2. 9=-7x-y

  3. anonymous
    • one year ago
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    Your Not Positive ?

  4. anonymous
    • one year ago
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    Someone else please check my work before confirming, I don't want to give a wrong answer ;-;

  5. anonymous
    • one year ago
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    lol its ok

  6. jim_thompson5910
    • one year ago
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    Standard form is `Ax+By=C` where A,B,C are whole numbers (most books make A to be a positive number)

  7. jim_thompson5910
    • one year ago
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    example of standard form 2x+3y = 10

  8. anonymous
    • one year ago
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    Ohh

  9. anonymous
    • one year ago
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    2 will be a and 3 will be b and 10 will be c

  10. jim_thompson5910
    • one year ago
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    for my example, yes

  11. jim_thompson5910
    • one year ago
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    the goal is to somehow transform y=1/2x-2 into the form Ax+By=C

  12. anonymous
    • one year ago
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    Ok Can You Help .

  13. jim_thompson5910
    • one year ago
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    first multiply every term by 2 to clear out that fraction

  14. anonymous
    • one year ago
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    1/2 * 2 =1

  15. anonymous
    • one year ago
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    2 x 2 =4

  16. jim_thompson5910
    • one year ago
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    doing that will turn y=1/2x-2 into 2y = x - 4

  17. jim_thompson5910
    • one year ago
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    now move the x over

  18. anonymous
    • one year ago
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    Subtract 2 From Both Sides

  19. jim_thompson5910
    • one year ago
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    you need to get the variable terms to one side

  20. anonymous
    • one year ago
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    So We Dont Subtract 2 from both sides

  21. jim_thompson5910
    • one year ago
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    more like subtract x from both sides

  22. anonymous
    • one year ago
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    2X?

  23. anonymous
    • one year ago
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    OH NVM I GET WHAT YOUR SAYING X FROM BOTH SIDES SO 1 FROM BOTH SIDES

  24. jim_thompson5910
    • one year ago
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    so we now have -x+2y = -4 that's technically in standard form where A = -1, B = 2, C = -4 but most books I've seen make A > 0. Multiply both sides by -1 to get x - 2y = 4

  25. anonymous
    • one year ago
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    OH

  26. anonymous
    • one year ago
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    jim ty b/c i don't know what im doing sorry :(

  27. anonymous
    • one year ago
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    So My End Result Should Of Been X-2Y=4

  28. jim_thompson5910
    • one year ago
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    yeah I'd go with x-2y = 4

  29. anonymous
    • one year ago
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    Ok What About the second problem ?

  30. jim_thompson5910
    • one year ago
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    same idea: get all of the variable terms to one side

  31. jim_thompson5910
    • one year ago
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    you don't have to worry about fractions this time

  32. anonymous
    • one year ago
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    lord i be confusing myself z

  33. anonymous
    • one year ago
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    -7 wll be a corect ?

  34. jim_thompson5910
    • one year ago
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    how do you move that -7x over? what must you do to both sides?

  35. anonymous
    • one year ago
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    subtract 7

  36. jim_thompson5910
    • one year ago
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    no

  37. jim_thompson5910
    • one year ago
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    |dw:1441330242955:dw|

  38. jim_thompson5910
    • one year ago
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    we have to turn that -7x into 0x somehow

  39. anonymous
    • one year ago
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    subract -7 - -7 =0

  40. jim_thompson5910
    • one year ago
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    you would add 7x to both sides |dw:1441330350746:dw|

  41. jim_thompson5910
    • one year ago
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    |dw:1441330365891:dw|

  42. jim_thompson5910
    • one year ago
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    you can think of it as subtracting off -7x -(-7x) = +7x

  43. anonymous
    • one year ago
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    oh right sorry

  44. jim_thompson5910
    • one year ago
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    either way you'll end up with 7x+y = -9

  45. anonymous
    • one year ago
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    right

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