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jessiegonzales

  • one year ago

MEDAL! 16. Solve the inequality. Graph the solution. l2x+7l<27

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  1. jim_thompson5910
    • one year ago
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    Rule: |x| < k turns into -k < x < k where k is some positive number

  2. jim_thompson5910
    • one year ago
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    use that rule to go from this l2x+7l<27 to this -27 < 2x + 7 < 27 then solve for x

  3. jessiegonzales
    • one year ago
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    -27<2x+7<27 -1 -1 Am I on the right track?

  4. jim_thompson5910
    • one year ago
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    you subtract 7 (not 1) from all sides

  5. jim_thompson5910
    • one year ago
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    |dw:1434962327834:dw|

  6. jim_thompson5910
    • one year ago
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    |dw:1434962353834:dw|

  7. jessiegonzales
    • one year ago
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    -20<2x

  8. jim_thompson5910
    • one year ago
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    do you see my second drawing?

  9. jessiegonzales
    • one year ago
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    yes

  10. jim_thompson5910
    • one year ago
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    |dw:1434962462493:dw|

  11. jim_thompson5910
    • one year ago
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    oops I made a typo

  12. jessiegonzales
    • one year ago
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    yes i know

  13. jim_thompson5910
    • one year ago
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    it's 27 not just 7 |dw:1434962492297:dw|

  14. jessiegonzales
    • one year ago
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    -20<2x<20

  15. jim_thompson5910
    • one year ago
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    close

  16. jim_thompson5910
    • one year ago
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    |dw:1434962558605:dw|

  17. jessiegonzales
    • one year ago
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    -20>2x<20

  18. jim_thompson5910
    • one year ago
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    -27 - 7 = -34

  19. jim_thompson5910
    • one year ago
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    think of it as 27+7, then make the result negative

  20. jessiegonzales
    • one year ago
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    how did you get that??

  21. jessiegonzales
    • one year ago
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    oh now i see

  22. jim_thompson5910
    • one year ago
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    or you can think of it as debt 27 IOUs plus 7 IOUs = 34 IOUs

  23. jim_thompson5910
    • one year ago
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    so you should have this |dw:1434962719551:dw|

  24. jim_thompson5910
    • one year ago
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    what comes next?

  25. jessiegonzales
    • one year ago
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    final answer -34<x<20

  26. jim_thompson5910
    • one year ago
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    no

  27. jessiegonzales
    • one year ago
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    oh. we get x alone?

  28. jim_thompson5910
    • one year ago
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    |dw:1434962824034:dw|

  29. jim_thompson5910
    • one year ago
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    yes you need to get x all by itself

  30. jessiegonzales
    • one year ago
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    -17<x<10

  31. jim_thompson5910
    • one year ago
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    correct

  32. jessiegonzales
    • one year ago
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    thankyou soo much

  33. jim_thompson5910
    • one year ago
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    you're welcome

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