Results 1 to 5 of 5

Math Help - algebra geometry

  1. #1
    Member
    Joined
    Aug 2009
    Posts
    211

    algebra geometry

    hi i'm new to maths so not sure exactly what section this should come under but i've been trying to figure it out for a while and still can't.

    the question is: the point (k, 2k) lies on the line with equation 2x+3y-6=0. find the value of k.

    the answer is in the back of the book but i really can't figure out how you would arrive at that answer with the information given.

    any help would be much appreciated, thankyou
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by mark View Post
    hi i'm new to maths so not sure exactly what section this should come under but i've been trying to figure it out for a while and still can't.

    the question is: the point (k, 2k) lies on the line with equation 2x+3y-6=0. find the value of k.

    the answer is in the back of the book but i really can't figure out how you would arrive at that answer with the information given.

    any help would be much appreciated, thankyou
    Substitute x = k and y = 2k into 2x+3y-6=0. Solve for k.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Aug 2009
    Posts
    211
    thanks mate. out of interest, what answer did you come up with? for k and 2k?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by mark View Post
    thanks mate. out of interest, what answer did you come up with? for k and 2k?
    More to the point, what answer did you come up with for k?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Member
    Joined
    Aug 2009
    Posts
    211
    k= 0.75 or 3/4. from your way of doing it thats how it works out and thats the answer in the back of the book as well so yeah, must be right. cheers for helping out with that, the book didn't explain how to do it that way.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Algebra in Geometry
    Posted in the Algebra Forum
    Replies: 1
    Last Post: May 13th 2009, 11:00 AM
  2. Geometry and algebra
    Posted in the Calculus Forum
    Replies: 2
    Last Post: September 3rd 2008, 05:52 AM
  3. algebra and geometry hard...
    Posted in the Advanced Algebra Forum
    Replies: 0
    Last Post: April 26th 2008, 12:23 PM
  4. Algebra/Coordinate Geometry
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: July 30th 2007, 04:18 PM
  5. geometry algebra
    Posted in the Geometry Forum
    Replies: 9
    Last Post: January 6th 2006, 04:00 AM

Search Tags


/mathhelpforum @mathhelpforum