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What is the radius of (x + 1)2 + (y - 3)2 = 9? Question 1 options: 81 1 9 3
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1 vote
What is the radius of (x + 1)2 + (y - 3)2 = 9?

Question 1 options:

81


1


9


3

User Jellybaby
by
6.0k points

1 Answer

1 vote
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
User Nelsonic
by
6.6k points
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