Im currently in Algebra and my teacher reccommened this site, i am having problems with parabolas and ellipses and circles....aghh!!! lol

so i have sum questions

what is the directrix of the parabola in this equation: y+3 = 1/10(x+2)^2 ?

what is the center of the ellipse with this equation:

9x^2 + 16y^2 -18x +64y=71

what is the foci of this equation?

7(x-2)^2 + 3(y-2)^2=21

the vertices of this equation are: (x+3)^2- 4(y-2)^2=4

find the foci of this hyperbola: 9y^2-72y-16x^2-64x-64=0

Any help will be appreciated....thnx