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spareb665

  • one year ago

X=-In2/(3In2+In5) round the answer 2 digits after the decimal sign.

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  1. Mertsj
    • one year ago
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    What is another form of 3ln2?

  2. spareb665
    • one year ago
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    In(8)?

  3. Mertsj
    • one year ago
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    Yes. And what is another form of ln8 + ln5 ?

  4. spareb665
    • one year ago
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    idk In(40)?

  5. Mertsj
    • one year ago
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    Yes. So now we have:

  6. Mertsj
    • one year ago
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    \[x=- \frac{\ln 2}{\ln 40}\]

  7. Mertsj
    • one year ago
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    So pick up your calculator and find the ln of 2, divide it by the ln of 40, round the answer to two decimal places and change it to its opposite.

  8. Mertsj
    • one year ago
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    What did you get?

  9. spareb665
    • one year ago
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    I got -0.1879018247

  10. spareb665
    • one year ago
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    but im not sure if its right 2^3x+1=5^-x= (3x+1)In2=-xIn5 3xIn2+In2=-xIn5 3xIn2+xIn5=-In2 X(3In2+In5)=-In2 X=-In2/(3In2+In5) =-In2/In40 = -0.1879018247

  11. Mertsj
    • one year ago
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    Round it to -.19

  12. spareb665
    • one year ago
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    did i do that right? x= -.19 ?

  13. Mertsj
    • one year ago
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    Replace x with -.19 and see if it makes the original equation true.

  14. Mertsj
    • one year ago
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    Also, that is what I got.

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