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anonymous

  • 5 years ago

if the sum of a number and 9 is tripled, the result is 8 less than twice the number. what is the number?

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  1. anonymous
    • 5 years ago
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    (x + 9) ^3 < 8(2x) x^3 + 27x^2 +243x + 729 < 16x x^3 + 27x^2 + 227x + 729 < 0

  2. anonymous
    • 5 years ago
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    oops

  3. anonymous
    • 5 years ago
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    (x+9)^3 < 2x - 8

  4. anonymous
    • 5 years ago
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    so, it would be negative 19 right?

  5. anonymous
    • 5 years ago
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    x^3 + 27x^2 + 243x + 729 < 2x - 8 x^3 + 27x^2 + 241x + 737 < 0

  6. anonymous
    • 5 years ago
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    OK WOW i obviously dont know pellet haha 3(x + 9) < 2x - 8 -19 < x

  7. anonymous
    • 5 years ago
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    pellet haha x<-19

  8. anonymous
    • 5 years ago
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    pretty sure i had the wrong answer too. because -19 doesn't check so that's not right either. hmm.

  9. anonymous
    • 5 years ago
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    no x < -35

  10. anonymous
    • 5 years ago
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    try that

  11. anonymous
    • 5 years ago
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    its the algebra 3x + 27 < 2x - 8 x < -35

  12. anonymous
    • 5 years ago
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    no pellet no it totally is -19

  13. anonymous
    • 5 years ago
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    it's actually -43

  14. anonymous
    • 5 years ago
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    haha flutter its -35. im going to stop responding now. try any number greater than -35

  15. anonymous
    • 5 years ago
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    -43. thanks for trying to help though =p

  16. anonymous
    • 5 years ago
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    haha i just did the math three times and i got -35

  17. anonymous
    • 5 years ago
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    hmm..well i will be able to see if it's right in a minute.

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