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  • 3 years ago

Solve the system of equations by graphing 3x + 2y = -2 -4x + 5y = -28

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  1. qpHalcy0n
    • 3 years ago
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    Do you have a graphing calculator or other utilities?

  2. qpHalcy0n
    • 3 years ago
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    Or do they want you to actually draw it. (Either way should be fine)

  3. Geometry_Hater
    • 3 years ago
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    You need to graph it and then look for a point of its intersection

  4. Discord
    • 3 years ago
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    Unfortunately I do not have a graphing calculator.

  5. Geometry_Hater
    • 3 years ago
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    You can download one onto your computer

  6. qpHalcy0n
    • 3 years ago
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    I would just use wolframalpha. The way these equations work out, there's no way you'd get an accurate answer on pencil/paper.

  7. Geometry_Hater
    • 3 years ago
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    or use a free one here http://my.hrw.com/math06_07/nsmedia/tools/Graph_Calculator/graphCalc.html

  8. Geometry_Hater
    • 3 years ago
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    So to start you need to get y by itself in both equations

  9. qpHalcy0n
    • 3 years ago
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    http://www.wolframalpha.com/input/?i=3x+%2B+2y+%3D+-2+and+-4x+%2B+5y+%3D+-28

  10. qpHalcy0n
    • 3 years ago
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    If you were using a TI calculator or some similar, you would have to isolate y.

  11. Discord
    • 3 years ago
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    How do I isolate y?

  12. qpHalcy0n
    • 3 years ago
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    Get y by itself in both equations.

  13. Geometry_Hater
    • 3 years ago
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    3x + 2y = -2 Subtract 3x ......2y = -3x -2 Divide by 2........ y= -3/2x - 1 Do the same for the other one

  14. Discord
    • 3 years ago
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    Oh okay. Let me work that out.

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