anonymous
  • anonymous
Which system of inequalities are graphed in this picture? (attached below)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
1 Attachment
nubeer
  • nubeer
ok can u find the equations of line?
anonymous
  • anonymous
what do you mean?

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nubeer
  • nubeer
you know equation of line.. coordinate geometry? finding slope?
anonymous
  • anonymous
no /: I don't really understand this/:
nubeer
  • nubeer
hmmm ok this would be hard then.. have u even find a slope or gradient? or studied of it?
anonymous
  • anonymous
no/: i'm sorry):
nubeer
  • nubeer
lol no worries.. well then u need to memorize few formula's and stay with me on this one.. \[slope = \frac{ y2-y1 }{ x2-x1 }\] the x's and y's are coordinates or points on graph.
nubeer
  • nubeer
|dw:1355596018107:dw|
nubeer
  • nubeer
pick one point and tell me it's coordinates/?
anonymous
  • anonymous
a point on the line or any point?
nubeer
  • nubeer
point on line.
anonymous
  • anonymous
(2,-4)
nubeer
  • nubeer
good.. now pick another one.
anonymous
  • anonymous
(-1,5)
nubeer
  • nubeer
good these points are x2, y2 and the before one and x1,y1 now put these points in the slope formula
anonymous
  • anonymous
would it be 9/-3 ?
nubeer
  • nubeer
yes. which is equal to -3 so m=-3 m is slope ok?
anonymous
  • anonymous
oh ok
nubeer
  • nubeer
ok good.. now the other formula.. equation of line y = mx+c
nubeer
  • nubeer
y = -3x +c right?
anonymous
  • anonymous
yeah
nubeer
  • nubeer
ok now choose any point from the above two and put the value of x and y in this equation to find c
anonymous
  • anonymous
I got 5 = 3 + c ?
nubeer
  • nubeer
yes find c..
nubeer
  • nubeer
you doing it right dont worry.
anonymous
  • anonymous
c = 2 ? and ohk thanks
nubeer
  • nubeer
yes c = 2 so your equation is y = -3x +2 y +3x = 2 as its told that its inequatlity so put an inequatlity sign .. and the line on graph is dotted so u will just put < or> sign not equal with them.. now tell me which region is shaded from the line.. above or below?
anonymous
  • anonymous
would it be > ? and above?
nubeer
  • nubeer
yes.
anonymous
  • anonymous
ohhhh ohk i see what you're doing! so now to find the other inequality.. do i pick two point from the other line? btw thank you for helping me (:
nubeer
  • nubeer
yes same way for other line .. and no worries.. anytime :)
anonymous
  • anonymous
thank you! I understand it much more (: I'll do the other line Thank you!
nubeer
  • nubeer
:) you are most welcome.

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