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iheartfood

  • 2 years ago

Which of the following correctly represents the coordinates of the foci of the ellipse attached?

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  1. iheartfood
    • 2 years ago
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  2. iheartfood
    • 2 years ago
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    answer choices A,B,C,D from top to bottom :) ***idk :( please explain! THanks :D

  3. Hero
    • 2 years ago
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    There's a great tutorial on this at purplemath.com

  4. iheartfood
    • 2 years ago
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    could you please explain this to me? :)

  5. Hero
    • 2 years ago
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    I'm not very good at explaining things.

  6. iheartfood
    • 2 years ago
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    so im not quite sure... but I'm thinking B or D right? :/

  7. iheartfood
    • 2 years ago
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    aww :( okay :/ but is it B or D? thats what i have simplified it down to so far...

  8. Hero
    • 2 years ago
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    You sound like you're guessing.

  9. iheartfood
    • 2 years ago
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    no I'm not cuz i remember a little bit... i got this: The denominator to y is 36, which is > than denominator of x which is 9... so its vertical right?? so you list the y first?? like this?? (y-4)^2/36 + (x+2)^2/9=1... idk am i on the right track so far??

  10. iheartfood
    • 2 years ago
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    does that look right to you so far??

  11. Hero
    • 2 years ago
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    I thought that was a minus, it's a plus, so yes, it will be either B or D.

  12. iheartfood
    • 2 years ago
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    kk :) so what i did so far is right? :D

  13. Hero
    • 2 years ago
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    At first, I thought it was \[\frac{(x+2)^2}{9} - \frac{(y-4)^2}{36} = 1\]

  14. iheartfood
    • 2 years ago
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    and the center is (-2, 4) right?? which leads me to either B or D... but idk how to find that last part :(

  15. iheartfood
    • 2 years ago
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    ohhh hhaa yeah its + :)

  16. Hero
    • 2 years ago
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    I looked at it wrong

  17. iheartfood
    • 2 years ago
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    haha yeah its all good =D

  18. Hero
    • 2 years ago
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    If you made it this far, you should be able to figure out which one it is between the two. I told you that you need to be more confident in your work rather than ask for confirmation every time you worked out a problem. When I was your age, I never asked for confirmation. I was always confident in my work.

  19. Hero
    • 2 years ago
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    I didn't use calculators either. I couldn't afford one when I was in HS.

  20. iheartfood
    • 2 years ago
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    oh yeah i just don't know what to do after that.. :(

  21. iheartfood
    • 2 years ago
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    can you please show me what to do from there?? idk what to do :(

  22. Hero
    • 2 years ago
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    I told you to review the tutorial on purplemath.com

  23. iheartfood
    • 2 years ago
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    i don't know where to find it though .... :( can u pls show me what to do from here?? :)

  24. iheartfood
    • 2 years ago
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    k so i found this link... http://www.purplemath.com/modules/ellipse2.htm is that it?? I'm reading on it and from that i think the answer is B.... is that it?? am i understanding that link correctly?? is it B?? :D @hero? :)

  25. Hero
    • 2 years ago
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    As I stated before, you should be more confident in your own work. I believe you're smart enough to understand this without having to constant beg me for confirmation.

  26. iheartfood
    • 2 years ago
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    okay... well i didn't know this one :( could u pls tell me if i got it right?? =)

  27. iheartfood
    • 2 years ago
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    but the tutorial helped a bit... did i get it?? is it B? :O

  28. Hero
    • 2 years ago
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    I'm not going to answer that question.

  29. iheartfood
    • 2 years ago
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    okay :) thanks for your help though @Hero!! :) It's much appreciated :)

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