Results 1 to 3 of 3

Math Help - Systems of inequalities

  1. #1
    Junior Member
    Joined
    Oct 2007
    Posts
    44

    Systems of inequalities

    Please check my answers:

    Graph the inequality.

    3x+5y< or equal to 15



    x^2+y^2>25



    y>x^2-4



    y< or equal to x^2+2


    Graph the solution set of the system of inequalities or indicate that the system has no solution.

    2x-y < or equal to -6
    x+2y> or equal to 2



    x+2y> or equal to 2
    x-y< or equal to 0



    x^2+y^2< or equal to 49
    10x+5y< or equal to 50



    Solve the problem.

    A person with no more than $4000 to invest plans to place the money in two investments, telecommunications and pharmaceuticals. The telecommunications investment is to be no more than 3 times the pharmaceuticals investment. Write a system of inequalities to describe the situation. Let x=amount to be invested in telecommunications and y=amount to be invested in pharmaceuticals.

    I got:

    x+y=4000
    x< or equal to 3y
    x> or equal to 0
    y> or equal to 0
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,940
    Thanks
    338
    Awards
    1
    Quote Originally Posted by soly_sol View Post
    Please check my answers:

    Graph the inequality.

    3x+5y< or equal to 15



    x^2+y^2>25



    y>x^2-4



    y< or equal to x^2+2
    These are good.

    -Dan
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,940
    Thanks
    338
    Awards
    1
    Quote Originally Posted by soly_sol View Post
    Graph the solution set of the system of inequalities or indicate that the system has no solution.

    2x-y < or equal to -6
    x+2y> or equal to 2



    x+2y> or equal to 2
    x-y< or equal to 0



    x^2+y^2< or equal to 49
    10x+5y< or equal to 50

    These are good, too.

    -Dan
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. confusing systems of inequalities
    Posted in the Algebra Forum
    Replies: 2
    Last Post: September 25th 2011, 12:31 PM
  2. Systems of Linear Inequalities
    Posted in the Algebra Forum
    Replies: 1
    Last Post: June 2nd 2010, 10:52 AM
  3. Systems of inequalities
    Posted in the Algebra Forum
    Replies: 0
    Last Post: April 26th 2009, 10:08 PM
  4. Systems of Equations/Inequalities
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: April 22nd 2008, 08:51 PM
  5. Replies: 5
    Last Post: March 7th 2008, 10:30 AM

Search Tags


/mathhelpforum @mathhelpforum