negative inequality real world application

Discussion in 'Secondary Education' started by chessimprov, Feb 24, 2011.

  1. chessimprov

    chessimprov Rookie

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    Feb 24, 2011

    What is a real world example I can use for negative inequalities? Thank you very much.
     
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  3. Aliceacc

    Aliceacc Multitudinous

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    Feb 24, 2011

    John has $100 in his pocket. He spends $25 each time he fills his car with gas. (John obviously doesn't drive my minivan.) How many fillups can John afford if he wants to keep at least a $10 emergency fund?

    Let x = # of fillups
    100-25x >= 10
    - 25x >= -90
    x <= 3.6

    If John needs more than 3 fillups, he kills his emergency fund.


    OK, maybe not my best work. But it's 7:25 am and I'm on vacation.
     
  4. Aliceacc

    Aliceacc Multitudinous

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    Feb 24, 2011

    It looks as though you're teaching either Pre-Algebra or Algebra I, is that correct?

    What topics are coming up? Let me root through my files and see if there's anything you can use.
     
  5. chessimprov

    chessimprov Rookie

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    Sep 30, 2012

    I was teaching Algebra I at the time I asked that question. Then I was teaching Algebra II then and some of the students had trouble with negative inequalities then too.

    Right now, I'm teaching Algebra II and AP Calc in a cyber environment.

    Sorry for not checking for so long. I hope all is going well for you, Aliceacc!
     
  6. Aliceacc

    Aliceacc Multitudinous

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    It is, thanks!

    Glad to have you back!
     

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