Results 1 to 4 of 4

Math Help - Hello guys I need some help! :(

  1. #1
    Newbie
    Joined
    Jun 2012
    From
    United States
    Posts
    2

    Hello guys I need some help! :(

    Well first I'd like to say that I'm happy to meet you all! My friends told me you guys here are some of the smartest there is so I've decided to ask for some help here!

    Here's my 1st question:

    The typical planetary orbit can be modeled by an ellipse with the start at one focucs.
    Suppose that two planets revolve around the same star.
    How many possible points of intersection could there be?

    a)0 or 1
    b)0,1,or 2
    c)0,1,2,or 4
    d)0,1,2,3,or 4
    I think its A. What do you guys say?

    2nd question

    Solve by using elimination:
    4x2+9y2=36
    4x2-25y2=100

    a) (3,0) (-3,0)
    b) no solution
    c) (0, 32/17) (0,-32/17)
    d) (3,32/17) (3,-32/17), (-3,32/17) , (-3,-32/17)
    I said it was b. Thoughts?

    Lastly:
    Solve by using elimination or substitution:
    x2+4y2=7
    2y2-x=4

    a) (-1,√6/2)
    b) (0,√2), (0,-√2)
    c) (1,√10/2)
    d) (-1,√6/2) (-1, -√6/2)
    I said it c. Thoughts?

    My test is tomorrow morning so if anyone could help me? I'd be more than thankful! Thanks.

    PS: = plus or minus
    √ = square root.... so √10/2 means the square root of 10 over 2.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Dec 2007
    From
    Ottawa, Canada
    Posts
    3,161
    Thanks
    70

    Re: Hello guys I need some help! :(

    Quote Originally Posted by sambo View Post
    1st question
    I think its A. What do you guys say?

    2nd question
    I said it was b. Thoughts?

    Lastly:
    I said it c. Thoughts?
    Sorry, but guesses are not part of maths.
    You show no actual work...so we can't tell where you're stuck.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jun 2012
    From
    United States
    Posts
    2

    Re: Hello guys I need some help! :(

    This was no guess. I already worked it out and those are the answers I arrived at. Someone please tell me the correct answers.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor Reckoner's Avatar
    Joined
    May 2008
    From
    Baltimore, MD (USA)
    Posts
    1,024
    Thanks
    75
    Awards
    1

    Re: Hello guys I need some help! :(

    Quote Originally Posted by sambo View Post
    This was no guess. I already worked it out and those are the answers I arrived at.
    How are we supposed to know that? Nothing you wrote in your post indicates that you put any effort into these problems. Why don't you show us what you've done, and then we can tell you if you are on the right track?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Hi Guys!
    Posted in the New Users Forum
    Replies: 0
    Last Post: May 28th 2012, 12:00 AM
  2. Hey Guys
    Posted in the New Users Forum
    Replies: 0
    Last Post: May 26th 2012, 10:19 PM
  3. how do you guys get to use?
    Posted in the Differential Equations Forum
    Replies: 1
    Last Post: October 5th 2009, 03:54 PM
  4. hello, guys
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: June 24th 2008, 10:19 AM
  5. Help Me Guys
    Posted in the Business Math Forum
    Replies: 8
    Last Post: February 24th 2006, 12:04 PM

Search Tags


/mathhelpforum @mathhelpforum