A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Solve. http://static.k12.com/bank_packages/files/media/mathml_ef759e1d2ede6cf06179a8fe33dcb0aeee3b0747_1.gif A. r ≤ –32 B. r ≥ –32 C. r ≤ –2 D. r ≥ –2

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

    These are usually pretty easy. It makes it easier if you pretend that the inequality sign is an equal sign, so: \[-\frac{ r }{ 4 }=8\] What would you do to get r by itself?

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

    take the 4 out?

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

    Yes ma'am! How would you do that?

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

    i dont know :/

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

    Well if you want to cancel out a number, you have to do the opposite. So since its r divided by -4, whats the opposite of division?

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

    multiplication

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

    Mhm! With equations the rule is "what you do to one side you must do to the other. So since we multipy by -4, we have to do the same to the other side. So that gives us \[-\frac{ r }{ 4 }\times-4 = 8(-4)\] \[r= -32\]

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

    Ohh alright, makes more sense to me now, so would it be A?

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

    Now the rule with inequalities, is that if you ever divide or multiply by a negative, then the sign switches directions. So since we had to multiply by -4, the sign switched from \[\le \to \ge \]

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

    So which would it be?

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

    B :)

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

    You got it :)

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

    Thank you !

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

    My pleasure

  15. 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.