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anonymous

  • one year ago

FAN AND MEDAL***

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  1. anonymous
    • one year ago
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    Choose the system of equations which matches the following graph:

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  2. anonymous
    • one year ago
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    A))x + 2y = −10 3x − y = 12 B)x − 2y = −10 3x − y = 12 C)x + 2y = −10 3x + y = 12 D) x − 2y = −10 3x + y = 12

  3. anonymous
    • one year ago
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    Do you know how to solve for y in this problem? And do you have a graphing calculator?

  4. anonymous
    • one year ago
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    mmm no ;/

  5. anonymous
    • one year ago
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    To both questions?

  6. anonymous
    • one year ago
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    yes ;/

  7. anonymous
    • one year ago
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    Alright do you want me to teach you on how to get to the answer or just show steps?

  8. anonymous
    • one year ago
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    teach me how to get the answer pleaseeee

  9. anonymous
    • one year ago
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    Okay so it's telling me to see which answer choice has equations that are the same as the lines on the graph. So in order for me to find that I would have to graph each equation from the answer choice.

  10. anonymous
    • one year ago
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    its C? ;/

  11. anonymous
    • one year ago
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    Let's start with A. The equations are \[x+2y=-10\]and\[3x-y=12\]First solve for y. In order to solve for y you would have to move all of the numbers and x over to the other side of the equal's sign. For example:\[x+2y=-10\](Let's get rid of the x and move it to the other side) |dw:1438811302574:dw| Then you have to divide by 2 to get rid of the 2 next to the y. |dw:1438811397930:dw|

  12. anonymous
    • one year ago
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    Okay hold on.

  13. anonymous
    • one year ago
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    ok

  14. anonymous
    • one year ago
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    Okay you're close but that's not right. If you know how to solve for y from each equation you can just graph those equations into you're graphing calculator to see if the lines match the graph given.

  15. anonymous
    • one year ago
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    It's okay. Lol I was showing it to you above. Look at my drawings. Do you know how I did those steps?

  16. anonymous
    • one year ago
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    no really but wait let me try i like try first

  17. anonymous
    • one year ago
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    Yes of course! :)

  18. anonymous
    • one year ago
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    i dont know i try

  19. anonymous
    • one year ago
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    Okay so you see the first equation in letter A?\[x+2y=-10\]First step is to get rid of the variables/numbers that add or subtract with y. Did you understand that part?

  20. anonymous
    • one year ago
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    This is what I'm trying to say:\[x+2y=-10\]|dw:1438812353474:dw|

  21. anonymous
    • one year ago
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    Yes it's one of those answer choices!

  22. anonymous
    • one year ago
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    mmm, so wait let me think

  23. anonymous
    • one year ago
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    D?

  24. anonymous
    • one year ago
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    Nope.

  25. anonymous
    • one year ago
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    why? ;/

  26. anonymous
    • one year ago
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    Because x-2y=-10 makes the line go upwards from left to right. The line goes down from left to right in the picture.

  27. anonymous
    • one year ago
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    Go to the website called Desmos. There you can launch a graphing calculator that can graph any equations. Even equations like these. So go to the website and type in your equations that way you can match the lines.

  28. anonymous
    • one year ago
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    oh i see, thank you so much!!!!

  29. anonymous
    • one year ago
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    https://www.desmos.com/

  30. anonymous
    • one year ago
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    You're welcome!

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