Question

Fi

Answer 1

u should read lesson first. this is the first thing that would be written in the chapter.

Answer 2

http://www.purplemath.com/modules/parabola3.htm

similar question. It will help u finding the answer..

Answer 3

?

Answer 4

@Kevin

Answer 5

ill help

Answer 6

Sorry I write the answer on wrong question XD

Answer 7

This is matrix question?

Answer 8

@Kevin go delete the answer on "MEDAL" milo123 is confused LOL

Answer 9

can someone help

Answer 10

I WILL, whats the q

Answer 11

??????? @iwanttogotostanford whats the Q????

Answer 12

dang google has 1 hit!!! LOL

Answer 13

I will help, but pls my answer me, this is question about matrix or what?

Answer 14

Find the standard form of the equation of the parabola with a focus at (0, -9) and a directrix y = 9.

y = negative one divided by ninex2
y2 = -36x
y = negative one divided by thirty sixx2
y2 = -9x

Answer 15

anyway to find the equation of a parabola, substitute the vertex coordinates for h and k, substitute the coordinates of another point on the parabola for x and y and then solve for a. The equations will differ depending on whether the parabola is vertical or horizontal.

Answer 16

that's all I know LOL

Answer 17

Do you have options? :)

Answer 18

options:

y = negative one divided by ninex^2
y^2 = -36x
y = negative one divided by thirty sixx^2
y^2 = -9x

Answer 19

its d the focus is always next to x

Answer 20

I still don't understand directrix means XD

Answer 21

Sorry, I'm sleepy.
Maybe I can figure this out tomorrow.
Hope there will be somebody answer you question