## anonymous 5 years ago 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.

1. anonymous

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

2. anonymous

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

3. 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.

4. 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

5. 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.

6. anonymous

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

7. 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

8. anonymous

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

9. anonymous

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

10. anonymous

What is the question?

11. anonymous

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

12. anonymous

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

13. anonymous

yeah, it's a hyperbola

14. anonymous

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

15. anonymous

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

16. anonymous

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

17. anonymous

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

18. 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.$y=\pm1/2x$

19. anonymous

A.

20. anonymous

WAIT

21. anonymous

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

22. anonymous

no not yet

23. anonymous

It is C.

24. anonymous

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

25. anonymous

(-2,2)

26. anonymous

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

27. anonymous

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

28. anonymous

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

29. anonymous

minor not major

30. anonymous

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

31. anonymous

is that the minor?

32. anonymous

Yes

33. 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

34. anonymous

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

35. anonymous

thanks!

36. anonymous

U R WELCOME