Plz
heeellp thx

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

Which function has the domain x> -11

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1