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- anonymous

FAN AND MEDAL***

- schrodinger

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- anonymous

Choose the system of equations which matches the following graph:

##### 1 Attachment

- anonymous

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

- anonymous

Do you know how to solve for y in this problem? And do you have a graphing calculator?

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## More answers

- anonymous

mmm no ;/

- anonymous

To both questions?

- anonymous

yes ;/

- anonymous

Alright do you want me to teach you on how to get to the answer or just show steps?

- anonymous

teach me how to get the answer pleaseeee

- anonymous

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.

- anonymous

its C? ;/

- anonymous

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|

- anonymous

Okay hold on.

- anonymous

ok

- anonymous

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.

- anonymous

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

- anonymous

no really but wait let me try i like try first

- anonymous

Yes of course! :)

- anonymous

i dont know i try

- anonymous

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?

- anonymous

This is what I'm trying to say:\[x+2y=-10\]|dw:1438812353474:dw|

- anonymous

Yes it's one of those answer choices!

- anonymous

mmm, so wait let me think

- anonymous

D?

- anonymous

Nope.

- anonymous

why? ;/

- anonymous

Because x-2y=-10 makes the line go upwards from left to right. The line goes down from left to right in the picture.

- anonymous

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.

- anonymous

oh i see, thank you so much!!!!

- anonymous

https://www.desmos.com/

- anonymous

You're welcome!

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