A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

If y varies directly as​ x, and y=12 when x=4​, find y when x=9.

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

    Direct variation, do you know the formula?

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

    y=kx

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

    I am getting the wrong answer and only have one try left for this online course. could you help?

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

    Substitute the given values.

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

    Start by solving for k k = y/x = 12/4 = ?

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

    i got 3=k and 3=x. says x is wrong

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

    One step at a time. k = 3. substitute this back in to your formula. y =3x Now when x = 9 what would y =? y = 3 * 9 = ?

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

    oh okay. i divided

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

    mmhmm.

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

    thx

  11. 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.