Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

OwlEyes

  • 2 years ago

Which of the following is the solution to the equation 25(z + 2) = 125 ? z = 5.5 z = 3.5 z = -2.5 z = -0.5

  • This Question is Closed
  1. mahmit2012
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1337048774351:dw|

  2. OwlEyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    3 isnt an option

  3. thejoshfish
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    just solve the equation.. it's not that hard.

  4. OwlEyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    is 3.5?

  5. mahmit2012
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1337049106838:dw|

  6. thejoshfish
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    test it. 3.5+2=5.5 5.5(25)=137 so no

  7. sputnik
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I would start by multiplying the equation out. 25z + 50 = 125. Then I would solve for z. First isolate it: 25z = 75 And then divide by 25. z = 3.

  8. OwlEyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    3 is not an option

  9. thejoshfish
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    well your math book is wrong then.

  10. OwlEyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    No i wrote it wrong!! lol Its: 25^(z+2)=125

  11. sputnik
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    You need to take the log of both sides then solve for z..

  12. OwlEyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    how do i do that?

  13. sputnik
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    It looks like this: 2 * ln(5) * z + 4 * ln(5) = 3 * ln(5)

  14. OwlEyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I dont know what that means??

  15. sputnik
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    And to finish it up as in actually compute it you need to use a calculator because the decimals are messy. 3.21 * z + 6.43 = 4.82 And solve for z.

  16. sputnik
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    You will get z = -0.5. Is that one of the options?

  17. OwlEyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yepp:)) Thanks sooo much!

  18. sputnik
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    No prob. Thanks for the medal. And for the logs, on the right hand side, 125 = 5 ^ 3. so it equals 3 * ln(5). The exponent out front and the log of what the exponent worked on.

  19. OwlEyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ohhh gotcha! Thanks again and you deserve it:)

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

    Search OpenStudy
    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.