Results 1 to 4 of 4

Math Help - Writing an inequality?

  1. #1
    Newbie
    Joined
    Jun 2008
    Posts
    3

    Writing an inequality?

    Erin lives 2 miles from school and 6 miles from her friend Janelle. Write an inequality that describes the interval distance from school to Janelle's house.

    Help ?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Aug 2007
    From
    USA
    Posts
    3,111
    Thanks
    2
    Same direction

    Erin -- 2 Miles -- School -- 4 Miles -- Janelle

    Opposite directions

    Janelle - 6 Miles -- Erin -- 2 Miles -- School

    Now what?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jun 2008
    Posts
    3
    I have to write something along the lines of
    6 < x < 2.


    Something like that ? But i'm not sure what.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Joined
    Aug 2007
    From
    USA
    Posts
    3,111
    Thanks
    2
    Right, so what's your plan?

    Stare at my little diagrams until it soaks in.

    You MAY wish to draw a different diagram.

    1) Draw a big circle - Label it "Janelle"
    2) Draw a smaller concentric circle inside the larger circle. - Label it "School"
    3) In the center of both circles (that is just one place) put Erin.
    4) From Erin, draw a little arrow to the School circle and call it "2 miles"
    5) From Erin, draw a little arrow to the Janelle circle and call it "6 miles"

    In your mind, move the little arrows around their respective circles. Pretty much like an analog clock. The difference of their endpoints is the distance from Janelle to School. Does it have a maximum value? Does it have a minimum value? Think about my original diagram and it should come to you after enough staring and pondering.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Writing inequality in interval notation
    Posted in the Pre-Calculus Forum
    Replies: 8
    Last Post: August 25th 2011, 03:28 AM
  2. Replies: 3
    Last Post: December 12th 2010, 02:16 PM
  3. Writing p = x^2 + y^2
    Posted in the Number Theory Forum
    Replies: 8
    Last Post: June 28th 2010, 12:35 PM
  4. Writing an inequality
    Posted in the Algebra Forum
    Replies: 2
    Last Post: August 23rd 2008, 12:10 PM
  5. Writing inequality
    Posted in the Algebra Forum
    Replies: 1
    Last Post: March 7th 2007, 08:22 AM

Search Tags


/mathhelpforum @mathhelpforum