courtj17 courtj17

29-01-2017
Mathematics

Answered

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

Question 1 options:

81

1

9

3

Verified Answer :

apologiabiology apologiabiology

29-01-2017

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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