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ramirokool

  • 3 years ago

Solve |5x – 8| > 12. Answer {x| -0.8 < x < 4} {x| -4 < x < 4} {x| x > 4 or x < -0.8} {x| x < -4 or x > 0.8}

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  1. TuringTest
    • 3 years ago
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    what foes absolute value mean @ramirokool ?

  2. TuringTest
    • 3 years ago
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    *does

  3. TuringTest
    • 3 years ago
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    if we had |x|=2 what could x possibly be?

  4. ramirokool
    • 3 years ago
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    The magnitude of a real number without regard to its sign.

  5. TuringTest
    • 3 years ago
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    right, so |x|=2 means x could be what two numbers?

  6. ramirokool
    • 3 years ago
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    a 4 and a 0.8 ? their should be a negative.

  7. ramirokool
    • 3 years ago
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    I got C on my sheet.

  8. ramirokool
    • 3 years ago
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    You divide.

  9. TuringTest
    • 3 years ago
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    |x|=2 means that we ignore the sign of x - that is all

  10. TuringTest
    • 3 years ago
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    |4|=4 that's not 2, so no

  11. TuringTest
    • 3 years ago
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    |0.8|=0.8 also not 2, so not correct

  12. ramirokool
    • 3 years ago
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    Go step by step.

  13. TuringTest
    • 3 years ago
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    I am, are you lost in what i just said?

  14. ramirokool
    • 3 years ago
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    Nope.

  15. hba
    • 3 years ago
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    @TuringTest Dude he just needs the answer :D

  16. TuringTest
    • 3 years ago
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    @hba do not assume that, he's working with me right now

  17. TuringTest
    • 3 years ago
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    ok, so considering things like that |-6|=6, and |0.88|=0.88 what could |x|=2 possibly be?

  18. ramirokool
    • 3 years ago
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    2

  19. TuringTest
    • 3 years ago
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    or...?

  20. ramirokool
    • 3 years ago
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    no or.

  21. TuringTest
    • 3 years ago
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    yes or, what is |-2| ?

  22. ramirokool
    • 3 years ago
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    but if it in the box would it be postive?

  23. TuringTest
    • 3 years ago
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    yes, so |-2|=?

  24. ramirokool
    • 3 years ago
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    2 ?

  25. TuringTest
    • 3 years ago
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    right, so |x|=2 means x could be what TWO numbers?

  26. hba
    • 3 years ago
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    Any thing which comes between | | < this becomes positive :)

  27. ramirokool
    • 3 years ago
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    -2 and 2

  28. TuringTest
    • 3 years ago
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    correct :)

  29. TuringTest
    • 3 years ago
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    so for |x|=y that means either x=y or -x=y

  30. ramirokool
    • 3 years ago
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    -x =y

  31. TuringTest
    • 3 years ago
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    so you problem is |5x – 8| > 12 based on what we just discussed, |5x - 8|>12 means that 12> what two expressions?

  32. TuringTest
    • 3 years ago
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    rather, 5x-8 could be what two numbers?

  33. ramirokool
    • 3 years ago
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    I still think it C cause that what I got, 0.8 and 4.

  34. TuringTest
    • 3 years ago
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    it's not C

  35. TuringTest
    • 3 years ago
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    |a|=b implies that either a=b or a=-b

  36. ramirokool
    • 3 years ago
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    My mistake D.

  37. TuringTest
    • 3 years ago
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    yes :)

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