Look at the graph.

which equation best represents the circle in the graph?

(x + 1)2 + (y - 4)2 = 9

(x + 1)2 + (y + 4)2 = 9

(x - 1)2 + (y - 4)2 = 9

(x - 1)2 + (y + 4)2 = 9

Assuming the 2's after the parentheses are squares, the answer would be the third option. The equation for a circle is (x – h)^2 + (y – k)^2 = r^2. Since it is in quadrant 1, there does not need to be any sort of sign changes for either x or y. 

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm