x2 + y2 = 2r2
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
7
(2-r)e-rr
No.
x2 + y2 = 2r2
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
X2 + y2 = 100 = r2 r = 10
7
X2 or 2 times x?
(2-r)e-rr
No.
If this is the equation of a circle, the answer is 11, except that there needs to be a plus sigb between the x2 and the y2
x2 + 2x + y2 = 12 (complete the square)(x2 + 2x + 1)+ y2 = 12 + 1(x + 1)2 + y2 = 13 (divide by 13 each element to both sides)(x + 1)2/13 + y2/13 = 1(x - -1)2/13 + (y - 0)2/13 = 1Thus, the center of the circle is (-1, 0) and its radius is 1.
4
3
Yes