anonymous
  • anonymous
What is the general form of the equation of a circle with its center at (-2, 1) and passing through (-4, 1)? x2 + y2 − 4x + 2y + 1 = 0 x2 + y2 + 4x − 2y + 1 = 0 x2 + y2 + 4x − 2y + 9 = 0 x2 − y2 + 2x + y + 1 = 0
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous

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anonymous
  • anonymous
anonymous
  • anonymous
@Flvs.net
anonymous
  • anonymous
anybody??
anonymous
  • anonymous
what's the distance between (-2, 1) and (-4, 1)
anonymous
  • anonymous
that will be the radius.
anonymous
  • anonymous
2 is the distance. so 2 is the radius. So what's the equation for a circle with radius 2 and center at (-2, 1)?
anonymous
  • anonymous
you've been asking these circle questions all day, and on just about every one of them someone's posted the equation where all you have to do is plug in the radius and center, and you always say you understand. please don't tag me if you're not even willing to make an attempt. This isn't my homework
anonymous
  • anonymous
@Flvs.net
anonymous
  • anonymous
please help! @Flvs.net
Flvs.net
  • Flvs.net
I'm here. So what do you think the answer is?
anonymous
  • anonymous
omg no please dont do that
anonymous
  • anonymous
i honestly have no idea
Flvs.net
  • Flvs.net
Standard form equation for a circle with center (h,k) and radius r is: (x−h) 2 +(y−k) 2 =r 2 So you have the center, now you just need the radius. Well, given the center and a point on the circle, the radius is just the distance between those 2 points. so use the distance formula to find the distance between those 2 points, which is your r: d=(x 1 −x 2 ) 2 +(y 1 −y 2 ) 2 − − − − − − − − − − − − − − − − − − √ Then plug your center point coordinates, and your r, back into the circle equation that I gave you above.
Flvs.net
  • Flvs.net
Came out wrong one sec.
anonymous
  • anonymous
6? xD
anonymous
  • anonymous
omg dude it's no use!
anonymous
  • anonymous
just please answer it!
anonymous
  • anonymous
@Flvs.net
Flvs.net
  • Flvs.net
Standard form equation for a circle with center (h,k) and radius r is: \[(x−h) ^{2} +(y−k) ^{2} =r ^{2}\] So you have the center, now you just need the radius. Well, given the center and a point on the circle, the radius is just the distance between those 2 points. so use the distance formula to find the distance between those 2 points, which is your r: \[d=\sqrt{(x _{1} −x _{2} ) ^{2} +(y _{1} −y _{2} ) ^{2} } \] Then plug your center point coordinates, and your r, back into the circle equation that I gave you above.
Flvs.net
  • Flvs.net
Here. You don't have to get mad.
anonymous
  • anonymous
lol im not mad it's just i hate how people are so annoying on here about not giving the stupid answers
anonymous
  • anonymous
like who gives a pellet
Flvs.net
  • Flvs.net
Well I just gave it to you so.
anonymous
  • anonymous
pellet* lol
anonymous
  • anonymous
wow it wont let me cuss xD
anonymous
  • anonymous
It's not just about not giving answers. You do realize that someone has to actually solve the problem right? Why should someone else put the effort in to do YOUR work?
Flvs.net
  • Flvs.net
I just did your work for you
anonymous
  • anonymous
thank you @Flvs.net
Flvs.net
  • Flvs.net
Np, peach how did you give me two medals?
Flvs.net
  • Flvs.net
@idontgetmath101 can you give me a medal?
anonymous
  • anonymous
i did @Flvs.net
anonymous
  • anonymous
i didn't @idontgetmath101 probably gave 1
Flvs.net
  • Flvs.net
Oh, okay.

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