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Calcmathlete

  • 3 years ago

Find the solution set of the inequality: |2x+5|+|4x+7|<30

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  1. Calcmathlete
    • 3 years ago
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    Please show all work!

  2. ReiKacanja
    • 3 years ago
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    6x+12<30 6x<18 x<3

  3. Calcmathlete
    • 3 years ago
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    That's not an answer choice

  4. Calcmathlete
    • 3 years ago
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    Someone help!!!!!

  5. pokemon23
    • 3 years ago
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    aviation hs for the win ;D

  6. ReiKacanja
    • 3 years ago
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    lol, Wat, it is right. Answer is x<3. 100% sure

  7. Calcmathlete
    • 3 years ago
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    I checked the answer key. The answer is -7≤x≤3 -_-

  8. ReiKacanja
    • 3 years ago
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    then are u sure the question is |2x+5|+|4x+7|<30

  9. Calcmathlete
    • 3 years ago
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    Wait, no ≤. Just <

  10. Calcmathlete
    • 3 years ago
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    Yes

  11. ReiKacanja
    • 3 years ago
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    ohhh i see. if you graph it, you find that x intercepts are 3 and -7 therefore x is between -7 - 3

  12. pokemon23
    • 3 years ago
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    your a ninth grade right rei

  13. Calcmathlete
    • 3 years ago
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    Oh. I see. It splits into two inequalities because you can flip the sign and negate the second part.

  14. ReiKacanja
    • 3 years ago
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    yeah and @pokemon23 yes im a ninth grader, u?

  15. pokemon23
    • 3 years ago
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    same

  16. ReiKacanja
    • 3 years ago
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    what school u go to?

  17. pokemon23
    • 3 years ago
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    same hs

  18. ReiKacanja
    • 3 years ago
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    :D message me

  19. pokemon23
    • 3 years ago
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    i join the aviation lol

  20. pokemon23
    • 3 years ago
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    101

  21. Calcmathlete
    • 3 years ago
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    Hey Rei, are you good at logarithms?

  22. ReiKacanja
    • 3 years ago
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    no, my nine year education does not cover logarithms

  23. Calcmathlete
    • 3 years ago
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    Alright. Thanks for the help. :)

  24. ReiKacanja
    • 3 years ago
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    No problem

  25. Taufique
    • 3 years ago
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    @Calcmathlete

  26. Calcmathlete
    • 3 years ago
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    Thank you

  27. Taufique
    • 3 years ago
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    welcome...

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