Posted by **Ajay** on Monday, May 7, 2012 at 8:26pm.

Write the standard equation of the ellipse with the given characteristics

vertices:(-8,1)(0,1) (-4,7) (-4,5)

center:(-4,1)

- Math -
**Reiny**, Monday, May 7, 2012 at 8:49pm
I think you have a typo

the centre (-4,1) must be the midpoint for both axes

it works for (-8,1 and (0,1) with 2a = 8 ----> a = 4

but (-4,1) is NOT the midpoint of (-4,7 and (-4,5)

the y values are incorrect

once you have them corrected,

2b = the difference in the y values, b = half of that

then after you have found b, replace it in

(x+4)^2 /4 + (y-1)^2 /b^2 = 1

- Math -
**PLEASE HELP**, Monday, May 7, 2012 at 9:04pm
i'M NOT SURE HOW TO FIND b CAN YOU SHOW ME PLEASE!

- Math -
**Reiny**, Monday, May 7, 2012 at 9:13pm
Ajay,

Did you not read what I said about the typo?

The way it is you cannot do the question.

Find the error and I can continue helping you.

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