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anonymous

  • one year ago

A circle is centered at (7, 8) and has a radius of 11. Which of the following is the equation for this circle? (x − 7)^2 + (y − 8)^2 = 121 (x − 7)^2 + (y − 8)^2 = 11 (x + 7)^2 + (y + 8)^2 = 121 (x + 7)^2 + (y + 8)^2 = 11

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  1. anonymous
    • one year ago
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    will donate medal to best answer

  2. misty1212
    • one year ago
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    HI!!

  3. anonymous
    • one year ago
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    @jim_thompson5910 @mathstudent55 @ganeshie8 @misty1212

  4. anonymous
    • one year ago
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    hi :)

  5. misty1212
    • one year ago
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    make a guess, i bet you are right general form is \[(x-h)^2+(y-k)^2=r^2\] put \(h=7,k=8,r=11\)

  6. anonymous
    • one year ago
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    so (x-7)^2+(y-8)^2=11^2 ?

  7. misty1212
    • one year ago
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    yeah although they need you to square 11

  8. anonymous
    • one year ago
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    ok

  9. anonymous
    • one year ago
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    so (x^2+49)+(y+64)=121 ?

  10. anonymous
    • one year ago
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    @misty1212 ?

  11. anonymous
    • one year ago
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    @jim_thompson5910

  12. anonymous
    • one year ago
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    D:

  13. anonymous
    • one year ago
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    oh no!!

  14. anonymous
    • one year ago
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    can you help me ?

  15. anonymous
    • one year ago
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    just take what you wrote above

  16. anonymous
    • one year ago
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    \[(x-7)^2+(y-8)^2=11^2 \]

  17. anonymous
    • one year ago
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    (x^2+49)+(y+64)=121 ?

  18. anonymous
    • one year ago
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    all @misty1212 was saying is that in your answer choices the 11 is squared

  19. anonymous
    • one year ago
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    so does that matter or not ?

  20. freckles
    • one year ago
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    are you trying to expand the square parts?

  21. anonymous
    • one year ago
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    no it doesn't matter except for your answer choices

  22. anonymous
    • one year ago
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    i dont know im bad at geometry

  23. freckles
    • one year ago
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    \[(x-7)^2=(x-7)(x-7)=x(x-7)-7(x-7)=x^2-7x-7x+49 \\ =x^2-14x+49\] no your choices do not have this form

  24. anonymous
    • one year ago
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    im confused

  25. anonymous
    • one year ago
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    D: D: D:

  26. freckles
    • one year ago
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    \[(x-h)^2+(y-k)^2=r^2 \\ \text{ you are give} (h,k)=(7,8) \text{ and } r=11 \\ \text{ just plug into this form }\] I think @satellite73 already walked you though this

  27. freckles
    • one year ago
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    replace h with 7 replace k with 8 replace r with 11

  28. anonymous
    • one year ago
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    yes

  29. anonymous
    • one year ago
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    (x-7)^2+(y-8)^2=121 ?

  30. freckles
    • one year ago
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    that is right

  31. anonymous
    • one year ago
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    tnx u deserve the medal

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