Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

californiagirl55

Please help: 4/5x + 5 < -3

  • one year ago
  • one year ago

  • This Question is Closed
  1. californiagirl55
    Best Response
    You've already chosen the best response.
    Medals 0

    I haven't done many problems like this before, what part should I do first?

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

    start by subtracting 5 from both sides so that you get the x by itself

    • one year ago
  3. californiagirl55
    Best Response
    You've already chosen the best response.
    Medals 0

    Ok so 4/5x < 2

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

    actually, doing it that way is going to make it more complicated than it needs to be ... one moment

    • one year ago
  5. californiagirl55
    Best Response
    You've already chosen the best response.
    Medals 0

    ok :)

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

    actually, that ended up being the quickest way ... but subtracting from both sides leaves you with 4/5x < -8

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

    because -3 -5 = -8

    • one year ago
  8. californiagirl55
    Best Response
    You've already chosen the best response.
    Medals 0

    ;P I always get mixed up with that even though I've gone over it a million times

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

    ok, right now with the equation like it is (4/5x < -8) ... you know "one" of the answers is zero because, well just because ... I forget why I just know it's true so just trust me and someone else who's taken math in the past decade will chime in in a bit to tell you

    • one year ago
  10. californiagirl55
    Best Response
    You've already chosen the best response.
    Medals 0

    ok so what should you do next?

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

    But, because they're tricky there's another answer too!

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

    next, multiply both sides by 5x to get that 5x out of the denominator

    • one year ago
  13. californiagirl55
    Best Response
    You've already chosen the best response.
    Medals 0

    ok so it would be 4x < -40 right

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

    4 = -40x

    • one year ago
  15. jiteshmeghwal9
    Best Response
    You've already chosen the best response.
    Medals 1

    \[4 < -3(5x+5)\]

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

    because \[\frac{ 4(5x) }{ 5x } = 4\] and \[-8 (5x )= -40x\]

    • one year ago
  17. qpHalcy0n
    Best Response
    You've already chosen the best response.
    Medals 1

    It's important to note, if this is (4/5)x + 5 < -3 or 4/(5x) + 5 < -3 These are not the same.

    • one year ago
  18. jiteshmeghwal9
    Best Response
    You've already chosen the best response.
    Medals 1

    \[4<-15x-15\]

    • one year ago
  19. jiteshmeghwal9
    Best Response
    You've already chosen the best response.
    Medals 1

    4+15<-15x

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

    @californiagirl55 my last equation should have had 4 < -40x (with < not =)

    • one year ago
  21. jiteshmeghwal9
    Best Response
    You've already chosen the best response.
    Medals 1

    19<-15x

    • one year ago
  22. jiteshmeghwal9
    Best Response
    You've already chosen the best response.
    Medals 1

    19/-15<x

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

    @qpHalcy0n has said the smartest thing in here thusfar ... I've been solving it as if the equation was \[\frac{ 4 }{ 5x } + 5 < 3\] And, @jiteshmeghwal9 is obviously answering it as if the question was \[\frac{ 4 }{5x + 5 } < 3\] which are completely different things

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

    grrr except I left off the negatives on the threes

    • one year ago
  25. jiteshmeghwal9
    Best Response
    You've already chosen the best response.
    Medals 1

    so what is the right question @RoamingBlue ??????/

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

    I have no idea *grins* wasn't my question to start with :D

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

    But if you solve it going down the path I was on you end up with 4 < -40x then 4/-40 < x or -1/10 < x < 0 as the final solution

    • one year ago
    • Attachments:

See more questions >>>

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.