Answer:
40. x^2 +(y+3)^2 = 7^2
41. (x+2)^2 +(y-5)^2 = 4^2
Explanation:
The equation for a circle is
(x-h) ^2 + (y-k)^2 = r^2
where (h,k) is the center and r is the radius
40. center (0,-3) and radius =7
(x-0)^2 +(y--3)^2 = 7^2
x^2 +(y+3)^2 = 7^2
41. center (-2,5) and radius =4
(x--2)^2 +(y-5)^2 = 4^2
(x+2)^2 +(y-5)^2 = 4^2