anonymous
  • anonymous
Solve the system of equations by graphing 3x + 2y = -2 -4x + 5y = -28
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
Do you have a graphing calculator or other utilities?
anonymous
  • anonymous
Or do they want you to actually draw it. (Either way should be fine)
Geometry_Hater
  • Geometry_Hater
You need to graph it and then look for a point of its intersection

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anonymous
  • anonymous
Unfortunately I do not have a graphing calculator.
Geometry_Hater
  • Geometry_Hater
You can download one onto your computer
anonymous
  • anonymous
I would just use wolframalpha. The way these equations work out, there's no way you'd get an accurate answer on pencil/paper.
Geometry_Hater
  • Geometry_Hater
or use a free one here http://my.hrw.com/math06_07/nsmedia/tools/Graph_Calculator/graphCalc.html
Geometry_Hater
  • Geometry_Hater
So to start you need to get y by itself in both equations
anonymous
  • anonymous
http://www.wolframalpha.com/input/?i=3x+%2B+2y+%3D+-2+and+-4x+%2B+5y+%3D+-28
anonymous
  • anonymous
If you were using a TI calculator or some similar, you would have to isolate y.
anonymous
  • anonymous
How do I isolate y?
anonymous
  • anonymous
Get y by itself in both equations.
Geometry_Hater
  • Geometry_Hater
3x + 2y = -2 Subtract 3x ......2y = -3x -2 Divide by 2........ y= -3/2x - 1 Do the same for the other one
anonymous
  • anonymous
Oh okay. Let me work that out.

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