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anonymous

  • 4 years ago

a (-1,-7) and b(-10,-8) are the endpoints of a diameter of a circle. find the radius of the circle. (step by step response please) :)

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  1. Mertsj
    • 4 years ago
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    Use the distance formula to find the length of the diameter and divide it by 2. That will be the radius.

  2. anonymous
    • 4 years ago
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    how do you find the numbers to put in the distance formula?

  3. Mertsj
    • 4 years ago
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    They are given in the problem. x1=-1, y1=-7, x2=-10, y2=-8

  4. anonymous
    • 4 years ago
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    im sorry, im still confused ....

  5. Mertsj
    • 4 years ago
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    Do you know the distance formula?

  6. anonymous
    • 4 years ago
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    yes

  7. Mertsj
    • 4 years ago
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    What is it?

  8. anonymous
    • 4 years ago
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    -b\[\sqrt{b^2-4AC}/2A\]

  9. anonymous
    • 4 years ago
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    -b +/_

  10. anonymous
    • 4 years ago
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    well, you got the quadratic formula!

  11. Mertsj
    • 4 years ago
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    \[d=\sqrt{(x _{2}-x _{1})^{2}+(y _{2}-y _{1})^2}\]

  12. Mertsj
    • 4 years ago
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    Plug the numbers into that. Simplify and divide by 2. That will be the radius.

  13. anonymous
    • 4 years ago
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    ha whoops .... my bad i prob shouldn't watch the super bowl while attempting math... thank you!

  14. Mertsj
    • 4 years ago
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    Sounds like a plan. Who are you rooting for?

  15. anonymous
    • 4 years ago
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    the browns! haha

  16. Mertsj
    • 4 years ago
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    Go Browns

  17. anonymous
    • 4 years ago
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    here we go brownies here we go!!

  18. anonymous
    • 4 years ago
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    wait the answer comes out negative...

  19. anonymous
    • 4 years ago
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    The browns arent playing silly. It's the giants and patriots

  20. anonymous
    • 4 years ago
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    i know lol

  21. anonymous
    • 4 years ago
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    okay good

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