can anyone help me more with equations of ellipses and hyperbolas? i would love to get passed this stuff already. been on it for a few weeks.

- anonymous

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- anonymous

I'd love to your problems of ellipses and hyperbolas.

- anonymous

the problem is \[4x ^{2}+9y ^{2}-8x-18y-23=0\]
find the center and separate the values with a comma

- anonymous

Are you telling me that
center (1,1)
Major axis vertices (4,1) , (-2,1)
Minor axis vertices (1,3) , (1,-1)
Foci (1 + sqrt 13,1) , (1 - sqrt 13,1)
were wrong???
I would like to know because I am sure it is correct.

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## More answers

- anonymous

well on the assignment i was doing, i can only miss 2 questions. 3 were wrong. so i exited out of the assignment because i was going to fail it anyways. so then i had to start over. and now it's not always the same questions

- anonymous

Well this one was the same one... I think on the second one you didn't type it in correctly. I think you missed a sign. Now when it comes to the sqrt 13, I don't know if it want you to use a calculator and estimate or use the sqrt 13.. You will have to know which one they want.

- anonymous

I will stick with you until you get enough correct if you want. If not, I will move on

- anonymous

you have to figure out the square & round it. but yeah, it's the same one. but it's very uncommon that it will repeat questions. i have no idea at all how to do any of this. kinda the reason why i have been on it for almost a month now

- anonymous

Put those answers in and tell me if they were wrong.

- anonymous

i just brought the assignment back up, it's not the same question.

- anonymous

What is the question?

- anonymous

find the center:
\[-4x ^{2}+y ^{2}-8x-12y+36=0\]
use commas to separate the values

- anonymous

How about (-1,6) .. does it say it is an hyperbola?

- anonymous

yeah, it's a hyperbola

- anonymous

Next question.
find the vertices for the hyperbola.
write your answer as (x1,y1),(x2,y2)

- anonymous

(-2,6),(0,6)

- anonymous

find the foci for this hyperbola
write your answer as (x1,y1),(x2,y2)
round if necessary to the nearest hundredth.

- anonymous

(-3.24,6),(1.24,6)

- anonymous

find the equation that represents the asymptotes of this hyperbolas
A.\[y=\pm2x\]
B.\[y-6=\pm1/2(x+1)\]
C.\[y-6=\pm2(x+1)\]
D.\[y=\pm1/2x\]

- anonymous

A.

- anonymous

WAIT

- anonymous

Did you put it in... I don't think it is correct. I forgot about the center..

- anonymous

no not yet

- anonymous

It is C.

- anonymous

find the center of this ellipse:
\[9x ^{2}+y ^{2}+36x-4y+31=0\]
use commas to separate the value

- anonymous

(-2,2)

- anonymous

find the major axis vertices for the ellipse
write your answer in this form (x1,y1),(x2,y2)

- anonymous

(-2,5),(-2,-1)

- anonymous

find the major axis vertices for this ellipse
write your answer in this form (x1,y1),(x2,y2)

- anonymous

minor not major

- anonymous

(-3,2),(-1,2)

- anonymous

is that the minor?

- anonymous

Yes

- anonymous

find the foci vertices for this ellipse
write your answer in this form (x1,y1),(x2,y2)
round if necessary to the nearest hundredth

- anonymous

(-2,5.16),(-2,-1.16)

- anonymous

thanks!

- anonymous

U R WELCOME

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