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  • I guess I have to explain the class to you. I will teach you everything we have learnt so far. So, we are currently learning about compound inequalities.
  • Okay everyone, today we have new student. His name's Johnny.
  • Compound Inequailties
  • Eh, Ms. Sumner. Besides from him, Im the only student here. Everyone else went on a fieldtrip, they left without me.
  • And remember kids, alway wear ur seatbelts.
  • Compound Inequailties
  • So you aren't going to do anything about it?
  • No, I have better things to do. Sarah, you take care of it. I'll be rigth back.
  • Great, I was going to give another class about compound inequalities, but if you're only two students I don't have to teach you stuffs.
  • Okay, thanks.
  • So lets say we have the following equation:  - 2 ≤ x - 6 ≤ 8
  • - 2 ≤ x - 6 and x - 6 ≤ 8 
  • - 2 ≤ x - 6 ≤ 8
  • Ther first thing you have to do is re-write it as: - 2 ≤ x - 6 and x - 6 ≤ 8  So now we have two equations.
  • Now we are going to work with the equation to the rigth. We need to get rid of number six so that the letter x is alone. To do that we are going to add  6  to both -2 and -6. That leaves us with...
  • +6       +6
  • - 2 ≤ x - 6 and x - 6 ≤ 8 
  • 4 ≤ x
  • - 2 ≤ x - 6 ≤ 8
  • Is it 4 ≤ x ?
  • Exactly!
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