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18 April, 19:46

What is the radius of (x + 1) 2 + (y - 3) 2 = 9?

Question 1 options:

81

1

9

3

+4
Answers (1)
  1. 18 April, 23:03
    0
    Easy

    the equation of a circle with center at (h, k) and radius r is

    (x-h) ² + (y-k) ²=r²

    we are given

    (x+1) ² + (y-3) ²=9

    (x+1) ² + (y-3) ²=3²

    radius is 3
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