Math Check

Hi! Can someone check my answers? Thanks!



Questions:

1.) What are all of the foci's for this Ellipse? (x-2)^2/3 + (y-2)^2/4=1

A.) (3,2)
B.) (2,2)
C.) (1,2)
D.) (2,3)
E. (2,1)

My answer: B & E.


2.) What is the eccentricity for this Ellipse?

A.) 2
B.) 1/2
C.) 3/4
D. 1

My answer: A.

asked by Karen
  1. a^2 = 3 , b^2 = 4
    a = √3 , b = 2

    so you have a vertical major axis, thus the x's must be the same , eliminating A and C
    y^2 + √3 ^2 = 2^2
    y^2 = 4 - 3 = 1

    y = ± 1

    so the centre is (2,2)
    moving one up and one down from there gives us
    (2,3) and (2,1)

    e = c/b = 1/2

    You should have been able to tell right away that B(2,2) could not possibly be a focus, since (2,2) is the centre

    posted by Reiny

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra II-Please check

    I'm sorry the computer jammed on an earlier post and I couldn't do anything-so here is the problem I need asistance with Please check and offer advice-I'm NOT SURE IF I USED CORRECT FORMULAS-thank you the problem is List the
  2. Math HELP

    I have my answers at the bottom but please do these questions so I can check my answers. Check my answers as well. Subtract these fractions. !Reduce them! 1. 5/7 - 3/10= 2. 11/18 - 5/12= 3. 1/3 - 1/6= 4. 7/12 - 1/16= 5. 7/8 -
  3. @ Mr. Falcon

    You posted 40 questions and no answers. You wrote "PLZ HELP ASP usa test prep " The best way to prepare for a test is to study your text!! We'll be glad to HELP you if you post no more than five questions and your answers. We'll
  4. @Kemon

    I deleted your 19 questions because you showed none of your work and posted no answers. If you'd like us to check a few of your answers, please repost no more than five questions along with your answers.
  5. @ Lucina -- SS

    I deleted your 32 questions because there were no answers. Please post no more than 5 of these questions, along with your answers. We'll be glad to check your answers for you.
  6. Math PLEASE HELP

    Please finish these questions so I can check my answers. All my answers are at the bottom. Adding and subtracting mixed numbers. Please finish these questions. The answer must be reduced to lowest terms! 1. 3 2/5 + 6 1/5= 2. 4 2/5
  7. To Sam: Penn Foster answers

    Please do not post any more answers. Jiskha is not a repository for any exam answers. In addition, we have no idea what the questions are. If you want to post a couple of your exam questions along with your answers, we'll be glad
  8. @ Helps meas pleases

    Your previous post was deleted because it had lots of questions -- but no answers. Please repost no more than five of those questions along with your answers. I'll be glad to check them.
  9. To LaShondra

    I've deleted your last two posts containing 45 multiple choice test questions, but no answers. That sure looks like cheating -- which is against Jiskha policy. If you'd like to post a couple of these questions with your answers,
  10. @JoJay12

    I deleted your umpteen questions because you included no answers. If you want help on a few, please post no more than five questions along with your answers. We'll check them for you.

More Similar Questions