What are the center and the radius of the circle 4x2 + 4y2 - 4x + 16y + 1 = 0?

Q: Write the equation of the circle centered at (1, – 5) with radius 10.

A: Standard equation of a circle:(x-h)2+(y-k)2=r2where (h,k) = coordinates of a circler = radius of a…

Q: Find the center and the leneth of the diameter of the circle whose diameters endpoints are (0,-4)…

A: End points of diameter of circle are -  (0, -4) and (7,8)

Q: 9. What is an equation of the circle with center (5, 13) and a radius of 9 units?

A:

Q: Determine the equation of a circle with radius 7, centred at the origin.

A: Equation of the circle passing through centre (x0, y0) and radius r is : (x-x0 ) 2 + (y-y0 ) 2 = r2…

Q: Here is a circle with a radius of 15 units whose center is at (0,0) 15

A: Find the  point on the circle