Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

mariomintchev

  • 2 years ago

5x+5y=1 25x+ky=4 solve for k

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

    there is few ways of working this out. Elimination, Substitution and maybe multiplication

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

    which way do you prefer?

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

    i need my mind refreshed. whichever method works best is the method i choose.

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

    ill use substitution then :P x = \[x = y - \frac{ 1 }{ 5 }\] 25x + ky = 4

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

    25(y - \[25(y - \frac{ 1 }{ 5 }) + ky = 4\]

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

    \[25y - 5 + ky = 4\]

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

    do you get it now?

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

    howd u get y-(1/5)?

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

    divide everything in the first equation by 5

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

    there is no solution :)

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

    ill use elimination now

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

    times the first equation by -5 -25x - 25y = -5 25x + ky = 4

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

    now add this equation vertically together. it would give you k=25

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

    i probably shoulda phrased the question the way they have it on my hw. it says: Determine the value of k for which the system of linear equations has no solutions.

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

    haha great :/ u say that now

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

    you know why there is no solution? if you sub K = 25 it wont work

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

    :(

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

    yes?

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

    because they equal different things

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

    \[\Huge{\color{Purple}{\\{\ \boxed{\mathbb{\text{}{}}{\color{green}{\color{blue}T{\color{purple}h{\color{pink}a{\color{red}nk}}}}}}}}} \] \[\Huge{\color{Purple}{\\{\ \boxed{\mathbb{\text{}{}}{\color{blue}Y{\color{green}o{\color{red}u}}}}}}} \]

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

    haha no, THANK YOU ! :)

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

    ok i have another one lol this one wants the k to have an infinite amount of solutions

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

    49x-49y=49 7x+ky=7

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

    the answer is not 1,7,49,1/7, or 1/49.

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

    @Kuoministers

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

    sorry been bit busy

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

    so do you have an idea where to start?

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

    i would times the 2nd equation by 7

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

    ok...

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

    do you undertand this yet lol?

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

    49x-49y=49 7x+ky=7 49x-49y=49 49x + 7ky = 49

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

    dont know where to go from there

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

    -49y - 7ky = 0 -7y(7 + k) = 0

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

    how do we get the k from that

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

    im bit confused :P you sure their is more than 1 answer??

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

    its 1 answer

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

    oh u said this one wants the k to have an infinite amount of solutions

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

    1 K but infinite solutions we need the K

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

    y(7 + k ) = 0 from this can you find K? im pretty sure you can :P

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

    hint: you only need to look at this question to get K

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

    ok its -7 lol

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

    im feeling slooow ha

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

    ok i g2g now :)

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

    have fun with your maths

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

    haha see ya.

  46. 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.