anonymous
  • anonymous
What is the solution to the system? Line 1 x y –1 9 3 –3 Line 2 x y –1 –1 2 5 ( _ , _ )
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
use the equation of a line formula y=mx+b
anonymous
  • anonymous
where m is the slope and b is the y-intercept
anonymous
  • anonymous
find the equation for the first line

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More answers

anonymous
  • anonymous
Ok. I'm working on it
anonymous
  • anonymous
@10115658 Y= -3x + 9
anonymous
  • anonymous
@10115658 Thank you. I think I have figured it out.
anonymous
  • anonymous
sorry, i was afk. give me a sec
anonymous
  • anonymous
ok
anonymous
  • anonymous
I got y=-3x+6
anonymous
  • anonymous
How did you get the 6?
anonymous
  • anonymous
y=-3x+b plug in a point and solve for b
anonymous
  • anonymous
9=-3(-1)+b
anonymous
  • anonymous
9=3+b b=6
anonymous
  • anonymous
I'm confused
anonymous
  • anonymous
I think I got it, b/c I lost you for a sec
anonymous
  • anonymous
ok, tell me what your answer is and i'll see what i get
anonymous
  • anonymous
ok, I figured it out
anonymous
  • anonymous
I'm trying to solve still.
anonymous
  • anonymous
I think it's 3. What do you think it is?
anonymous
  • anonymous
what is 3?
anonymous
  • anonymous
x
anonymous
  • anonymous
you should get a point x,y
anonymous
  • anonymous
thats not what i got for x
anonymous
  • anonymous
I'll try again with a point.
anonymous
  • anonymous
Do you want me to show you how i got to my answer?
anonymous
  • anonymous
Yes please
anonymous
  • anonymous
ok, so i found the equation for the first line as y=-3x+6, which i showed you previously
anonymous
  • anonymous
Yeah
anonymous
  • anonymous
the equation for the second line is y=2x+1, using the same method as the equation for the first line
anonymous
  • anonymous
now we need to find what x and y are
anonymous
  • anonymous
so we replace y in the first equation with 2x+1 and solve for x
anonymous
  • anonymous
2x+1=-3x+6
anonymous
  • anonymous
Ok I was trying to figure out x and y too.
anonymous
  • anonymous
solving for x i got x=1
anonymous
  • anonymous
Then replace x with 1 in one of the equations to find y
anonymous
  • anonymous
y=2(1)+1
anonymous
  • anonymous
y=3
anonymous
  • anonymous
so the point is (1,3)
anonymous
  • anonymous
Do you agree with the answer?
anonymous
  • anonymous
Ok, but wouldn't be 9 though,b/c of the y-intercept.
anonymous
  • anonymous
B I mean
anonymous
  • anonymous
what do you mean? are you talking about the equation for the first line?
anonymous
  • anonymous
Yes
anonymous
  • anonymous
ok, theres an easy way to see if the equation is correct or not
anonymous
  • anonymous
so you think the equation is y=-3x+9 correct?
anonymous
  • anonymous
Yeah
anonymous
  • anonymous
ok, so you plug in a point and see if both sides of the equation are equal
anonymous
  • anonymous
lets plug in -1,9
anonymous
  • anonymous
Ok
anonymous
  • anonymous
9=-3(-1)+9
anonymous
  • anonymous
does 3(-1)+9 equal 9?
anonymous
  • anonymous
Not equal
anonymous
  • anonymous
so that equation is incorrect lets try my equation
anonymous
  • anonymous
9=-3(-1)+6
anonymous
  • anonymous
Yeah lets try it
anonymous
  • anonymous
9=9 so the equation works
anonymous
  • anonymous
Yeah the equation works
anonymous
  • anonymous
so you understand now?
anonymous
  • anonymous
Yes thank you for helping me. I gave you a medal and became a fan.
anonymous
  • anonymous
https://www.wolframalpha.com/input/?i=y%3D-3x%2B6+%2C+y%3D2x%2B1
anonymous
  • anonymous
thats a nice visual representation
anonymous
  • anonymous
It is. It helped.
anonymous
  • anonymous
cool
anonymous
  • anonymous
Yeah thanks. I appreciate it.

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