Which of the following equations correctly represents a circle centered at the origin with a radius of 5? A. x2 + y2 = 25
B. x2 + y2 = 5
C. (x - 5)2 + y2 = 25
D. (x - 5)2 + (y - 5)2 =5

Question

Which of the following equations correctly represents a circle centered at the origin with a radius of 5?  A.	x2 + y2 = 25
 		B.	x2 + y2 = 5
 		C.	(x - 5)2 + y2 = 25
 		D.	(x - 5)2 + (y - 5)2 =5

anonymous · Answer

are you going to post the choices

anonymous · Answer

The general equation for a circle is:
$$(x-h)^2+(y-k)^2=r^2$$
Where h and k represent the coordinates of the center. If it's the origin, it simplifies to:
$$x^2+y^2=r^2$$

anonymous · Answer

d?

anonymous · Answer

remeber it's equal to r^2, so if r=5...

anonymous · Answer

it's not d.

anonymous · Answer

A