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anonymous

  • one year ago

Write the standard equation of the circle with center (-8, -7) and a radius of 6.

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  1. anonymous
    • one year ago
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    A) (x + 8)2 + (y + 7)2 = 6 B) (x – 8)2 + (y – 7)2 = 6 C) (x + 8)2 + (y + 7)2 = 36 D) (x – 8)2 + (y – 7)2 = 36

  2. anonymous
    • one year ago
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    @mathmath333

  3. mathmath333
    • one year ago
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    if centre is \((a,b)\) and radius is \(r\) the equation of the circle is \((x-a)^2+(y-b)^2=r^2\)

  4. anonymous
    • one year ago
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    but there is no equation that adds up to that!!!

  5. triciaal
    • one year ago
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    yes there is

  6. anonymous
    • one year ago
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    No it is either both subtraction or both addition

  7. triciaal
    • one year ago
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    when you subtract a negative it becomes a positive

  8. triciaal
    • one year ago
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    now try again

  9. anonymous
    • one year ago
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    So it would be B?

  10. triciaal
    • one year ago
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    no

  11. anonymous
    • one year ago
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    It would be A? Because the equation has to add up to 6

  12. triciaal
    • one year ago
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    |dw:1433962354349:dw|

  13. triciaal
    • one year ago
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    read the response by @mathmath333

  14. anonymous
    • one year ago
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    So it would be A?

  15. triciaal
    • one year ago
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    look at the drawing

  16. triciaal
    • one year ago
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    the equation does not have to add up to 6

  17. anonymous
    • one year ago
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    Yeah so it would be A

  18. anonymous
    • one year ago
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    So it would be D then?

  19. triciaal
    • one year ago
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    If you insist on it being A then we cannot help you.

  20. anonymous
    • one year ago
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    I said it would be D @triciaal

  21. triciaal
    • one year ago
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    I said look at the formula and look at the drawing and I explained why when you get the answer you have to match the correct option

  22. triciaal
    • one year ago
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    so it's not A, it's not B and it's not D please review so you understand why

  23. anonymous
    • one year ago
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    Because the negative's turn into positive's and they are squared so they would add up to 36 squared

  24. triciaal
    • one year ago
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    |dw:1433963008379:dw|

  25. anonymous
    • one year ago
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    Yeah so it is C

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