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Math Help - Could you please, please, help me to graph these inequalities.

  1. #1
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    Could you please, please, help me to graph these inequalities.

    Hello. How are you guys doing?

    I don't have idea about how to graph in excel or word.. could you please help me to graph these inequalities?

    1) 3x+4y>4 and x-2y<-1

    2) x/2+y/4<1

    3) 4x+1y ≥. 26 and 2x+y ≥18
    4)x+5y≥ and x+y ≥ 5

    thank you.
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  2. #2
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    Quote Originally Posted by jhonwashington View Post

    I don't have idea about how to graph in excel or word.. could you please help me to graph these inequalities?
    I did not know word had a graphing package? I think you mean graph in excel and paste such charts into Word.

    Quote Originally Posted by jhonwashington View Post

    4)x+5y≥ and x+y ≥ 5

    thank you.
    This makes no sense.


    Quote Originally Posted by jhonwashington View Post

    1) 3x+4y>4 and x-2y<-1

    2) x/2+y/4<1

    3) 4x+1y ≥. 26 and 2x+y ≥18
    4)x+5y≥ and x+y ≥ 5

    thank you.
    Most of these are in intercept form. All you need to do is find the x-intercept by making y = 0 and then find the y-intercept by making x = 0.

    Here's an example.

    Quote Originally Posted by jhonwashington View Post

    1) 3x+4y>4
    x=0:

     3\times 0 +4y>4

     0 +4y>4

     4y>4

     y>1

    This means you have a point (0,1)


    y=0:

    3x+4\times 0>4

    3x+ 0>4

    3x>4

    x>\frac{4}{3}

    This means you have a point \left(\frac{4}{3},0\right)

    Now join the points and find the required region.
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  3. #3
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    thank you.

    Thank you pickslides... could you please help me to graph those inequalities in excel??? I already solved the inequalities, but I don't know how to graph them, for instance, this is how I solved the following inequality:

    4x+1y ≥26
    2x+y ≥8
    X+1/4y=6.5
    X+1/2y=9
    -1/4y=-2.5
    Y=10
    X=9-5=4

    And you were right about inequality number 4, i forgot to type a number..
    3) x+5y≥ 9 and x+y ≥ 5
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