anonymous
  • anonymous
how do I find x intercept for "3y = 9x + 15"? I found the y intercept, I just need help with the x.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Jhannybean
  • Jhannybean
Same method as before
anonymous
  • anonymous
3y = 9x + 15 3 x 0= 9x + 15 0= 9x + 15 -15 -15 -15= 9x No what? @Jhannybean
Jhannybean
  • Jhannybean
Now isolate the x by dividing both sides of the equation by 9

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anonymous
  • anonymous
But that doesn't make any sense. -15 / 9 = -1.666continued
Jhannybean
  • Jhannybean
Keep it fractional. Just reduce \(-\dfrac{15}{9}\)
anonymous
  • anonymous
so how would I plot that?
anonymous
  • anonymous
|dw:1440295720660:dw|
anonymous
  • anonymous
yes or no?
Jhannybean
  • Jhannybean
3y = 9x + 15 when you solved for y, you got y=5, yes? your point here became (0, 5) and when you set y to 0, you got (-15/9 , 0) or (-1.666... , 0) You just have to kind of eyeball the -1.66... it's a little bit past the -1.5 but no where near the -2
Jhannybean
  • Jhannybean
I was wrong, in stating what your points are, i would prefer writing my point as \(-15/9, 0) but in graphing it, -1.6 is fine.
jim_thompson5910
  • jim_thompson5910
|dw:1440296802526:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1440296857983:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1440296883282:dw|

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