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Tresag

  • 3 years ago

solve the system of linear equations by graphing. [3x+y=0 [2x+y=2

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  1. sonja_lee2
    • 3 years ago
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    get y by its self do u know how to do that?

  2. Tresag
    • 3 years ago
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    no

  3. sonja_lee2
    • 3 years ago
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    okay well you divide 3x by 0 and what do u get?

  4. Tresag
    • 3 years ago
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    0

  5. sonja_lee2
    • 3 years ago
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    no for equations like this u just keep it in the equation so what you suppose to get is y=3x+0 and now you have something to graph

  6. sonja_lee2
    • 3 years ago
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    no try and do it on the next one

  7. sonja_lee2
    • 3 years ago
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    i meant now try*

  8. Tresag
    • 3 years ago
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    so is it -3x ?

  9. sonja_lee2
    • 3 years ago
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    no where did u get the negative from?

  10. sonja_lee2
    • 3 years ago
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    i gave u the answer now all u have to do it graph it

  11. sonja_lee2
    • 3 years ago
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    but u still have to get the 2x+y=2 try to do it

  12. Tresag
    • 3 years ago
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    I don't know how to graph that

  13. sonja_lee2
    • 3 years ago
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    the answer is [y=3x+0 [y=2x+2 you dont know how to graph that?

  14. Tresag
    • 3 years ago
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    no

  15. sonja_lee2
    • 3 years ago
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    do u know what the y-intercept is?

  16. sonja_lee2
    • 3 years ago
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    and the slope?

  17. Tresag
    • 3 years ago
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    no

  18. sonja_lee2
    • 3 years ago
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    do you know this equation y=mx+b?

  19. sonja_lee2
    • 3 years ago
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    m is the slope and b is the y-intercept?

  20. Tresag
    • 3 years ago
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    I don't understand :(

  21. sonja_lee2
    • 3 years ago
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    is this your homework?

  22. Tresag
    • 3 years ago
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    yes

  23. helder_edwin
    • 3 years ago
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    u have \[ \large 3x+y=0\qquad\text{and}\qquad 2x+y=2 \]

  24. Tresag
    • 3 years ago
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    ok

  25. helder_edwin
    • 3 years ago
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    isolating y u have \[ \large y=-3x\qquad\text{and}\qquad y=-2x+2 \] ok?

  26. Tresag
    • 3 years ago
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    ok

  27. helder_edwin
    • 3 years ago
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    the easiest way to graph lines is doing a table. u need only two points.

  28. Tresag
    • 3 years ago
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    ok

  29. helder_edwin
    • 3 years ago
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    |dw:1348879936181:dw|

  30. helder_edwin
    • 3 years ago
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    |dw:1348879976897:dw|

  31. Tresag
    • 3 years ago
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    ok so what is the ordered pair ?

  32. helder_edwin
    • 3 years ago
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    for the first line u have the points (0,0) and (1,-3) for the second (0,2) and (1,0).

  33. Tresag
    • 3 years ago
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    ok, so what is the solution of the system of equations ????

  34. helder_edwin
    • 3 years ago
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    draw the lines. do it with the outmost precision u can.

  35. helder_edwin
    • 3 years ago
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    i can't do it here. this is something u have to do on your own.

  36. Tresag
    • 3 years ago
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    ok, thanks

  37. helder_edwin
    • 3 years ago
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    u r welcome

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