Discussion in 'Secondary Education' started by chessimprov, Feb 24, 2011.
Feb 24, 2011
What is a real world example I can use for negative inequalities? Thank you very much.
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.
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.
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!
It is, thanks!
Glad to have you back!