A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Solve for x. Round to nearest hundredth. 2=ln(x+7)

  • This Question is Closed
  1. Vocaloid
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    rewriting both sides in base e gives us e^2 = x + 7 solve for x

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    What is e?

  3. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    e is the base of the natural log.

  4. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    In other words, \(\ln(a)\) is same as \(\log_e(a)\)

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    So how do i find x?

  6. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Use: \(\log_a{b}=c ~~~~~~\Longrightarrow ~~~~~~a^c=b\)

  7. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    this is the rule./

  8. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    \(\log_e(x+7)=2\) \(e^2=x+7\) \(x=?\)

  9. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I understand the process but i dont understand how to find x

  10. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    you have just a single step left.

  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Would it be 2.64 ??

  12. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    no

  13. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    (your answer will involve e^2)

  14. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I have no idea.m

  15. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    subtract 7 from both sides

  16. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    -7?

  17. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    e^2=x+7 subtract 7 from both sides and you get?

  18. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    E^2-7 =x

  19. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    yes

  20. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Would the answer just be -7? It has to be numbers..i cant use letters

  21. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    approximtae e^2

  22. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    http://www.wolframalpha.com/input/?i=e%5E2-7

  23. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    about 0.3891

  24. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Since it says to round to the nearest hundredth would it just be 0.389

  25. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ??

  26. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    hunderedth is the 2dn decimal place

  27. SolomonZelman
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    2nd **

  28. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thank you for all your help!!

  29. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.