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anonymous

  • one year ago

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

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  1. anonymous
    • one year ago
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    @DaBest21

  2. anonymous
    • one year ago
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    @rvc

  3. anonymous
    • one year ago
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    @sourwing

  4. anonymous
    • one year ago
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    @3spooky5me

  5. anonymous
    • one year ago
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    @Flvs.net

  6. anonymous
    • one year ago
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    anybody??

  7. anonymous
    • one year ago
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    what's the distance between (-2, 1) and (-4, 1)

  8. anonymous
    • one year ago
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    that will be the radius.

  9. anonymous
    • one year ago
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    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)?

  10. anonymous
    • one year ago
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    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

  11. anonymous
    • one year ago
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    @Flvs.net

  12. anonymous
    • one year ago
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    please help! @Flvs.net

  13. Flvs.net
    • one year ago
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    I'm here. So what do you think the answer is?

  14. anonymous
    • one year ago
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    omg no please dont do that

  15. anonymous
    • one year ago
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    i honestly have no idea

  16. Flvs.net
    • one year ago
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    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.

  17. Flvs.net
    • one year ago
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    Came out wrong one sec.

  18. anonymous
    • one year ago
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    6? xD

  19. anonymous
    • one year ago
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    omg dude it's no use!

  20. anonymous
    • one year ago
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    just please answer it!

  21. anonymous
    • one year ago
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    @Flvs.net

  22. Flvs.net
    • one year ago
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    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.

  23. Flvs.net
    • one year ago
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    Here. You don't have to get mad.

  24. anonymous
    • one year ago
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    lol im not mad it's just i hate how people are so annoying on here about not giving the stupid answers

  25. anonymous
    • one year ago
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    like who gives a pellet

  26. Flvs.net
    • one year ago
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    Well I just gave it to you so.

  27. anonymous
    • one year ago
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    pellet* lol

  28. anonymous
    • one year ago
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    wow it wont let me cuss xD

  29. anonymous
    • one year ago
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    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?

  30. Flvs.net
    • one year ago
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    I just did your work for you

  31. anonymous
    • one year ago
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    thank you @Flvs.net

  32. Flvs.net
    • one year ago
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    Np, peach how did you give me two medals?

  33. Flvs.net
    • one year ago
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    @idontgetmath101 can you give me a medal?

  34. anonymous
    • one year ago
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    i did @Flvs.net

  35. anonymous
    • one year ago
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    i didn't @idontgetmath101 probably gave 1

  36. Flvs.net
    • one year ago
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    Oh, okay.

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