Question

Write the equation of a circle with center at (7, 3) and a diameter of 24.
A. (x + 7)2 + (y + 3)2 = 144
B. (x - 7)2 + (y – 3)2 = 144
C. (x - 3)2 + (y – 7)2 = 576
D. (x - 7)2 + (y – 3)2 = 576

Answer 1

for you last problem:

if the focus is (-4, 0) then your equation will be x = -(1/16)y^2

if the focus is (0, 4) then your equation will be y = -(1/16)x^2

Answer 2

and the answer to this is B

Answer 3

ya know, i went back and looked really quick, and i chose that one cause it just seemed like the right one, and it was. late night recap homework is so easy when you have gut feelings.