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24 December, 18:17

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Post Test: Coordinate Geometry and Circles

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Circle O is represented by the equation (x + 7) + ( + 7) 2 = 16. What is the length of the radius of circle o?

O A.

3

OB. 4

OC. 7

OD. 9

0

E.

16

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Answers (1)
  1. 24 December, 21:29
    0
    B. 4

    Step-by-step explanation:

    The formula for this equation is (x-h) ² + (y-k) ²=r²

    So 16 is represented by r² in that equation

    All you have to do is find the square root of 16, which is 4, so the answer is B. 4
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