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Mathematics 19 Online
OpenStudy (anonymous):

Please help, will give medal!! What are the x and y intercept of the graph of 3x+4y=-36?? x-intercept :-12, y-intercept:-9 x-intercept:-9, y-intercept: 12 x-intercept: 9, y-intercept: -12 x intercept: 12, y-intercept: -9

OpenStudy (jonnyvonny):

Mmk, well, to make this function look not as ugly, we should get y alone.

OpenStudy (jonnyvonny):

Are you familiar with reverse PEMDAS?

OpenStudy (anonymous):

kind of not exactly

OpenStudy (jonnyvonny):

Mmk, no problem at all. Pemdas is what you do to solve a problem, and reverse pemdas is what you do to change it up. Now, for this, you have to subtract and add first.

OpenStudy (anonymous):

so would it be 4y= -3x - 36 ?

OpenStudy (jonnyvonny):

Correct! Now, get rid of the "4" multiplying the "y".

OpenStudy (anonymous):

what do u mean by multiplying wouldn't u divide

OpenStudy (jonnyvonny):

Math is about segregation; no equal rights here.

OpenStudy (jonnyvonny):

Yes you're right; I typed that incorrectly.

OpenStudy (jonnyvonny):

|dw:1412274325418:dw|

OpenStudy (anonymous):

so would you divide 4 by -36?

OpenStudy (jonnyvonny):

So, you divide everything by 4 to get y alone

OpenStudy (jonnyvonny):

everything

OpenStudy (jonnyvonny):

The 3x and the -36 and the 4y is being divided by 4.

OpenStudy (jonnyvonny):

-3x, sorry

OpenStudy (anonymous):

so would it be y=-3/4x-9 ?

OpenStudy (jonnyvonny):

Correct! Now, when is there an x-intercept?

OpenStudy (jonnyvonny):

It happens when which variable is equal to 0? X or Y?

OpenStudy (anonymous):

I'm lost

OpenStudy (jonnyvonny):

Okay, no problem.

OpenStudy (jonnyvonny):

So, we have the funtion y= -3/4x -9.

OpenStudy (anonymous):

so would I have to graph it?

OpenStudy (jonnyvonny):

That graph will look something like this|dw:1412274799955:dw|

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