A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

how do I find x intercept for "3y = 9x + 15"? I found the y intercept, I just need help with the x.

  • This Question is Open
  1. Jhannybean
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Same method as before

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

    3y = 9x + 15 3 x 0= 9x + 15 0= 9x + 15 -15 -15 -15= 9x No what? @Jhannybean

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

    Now isolate the x by dividing both sides of the equation by 9

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

    But that doesn't make any sense. -15 / 9 = -1.666continued

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

    Keep it fractional. Just reduce \(-\dfrac{15}{9}\)

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

    so how would I plot that?

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

    |dw:1440295720660:dw|

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

    yes or no?

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

    3y = 9x + 15 when you solved for y, you got y=5, yes? your point here became (0, 5) and when you set y to 0, you got (-15/9 , 0) or (-1.666... , 0) You just have to kind of eyeball the -1.66... it's a little bit past the -1.5 but no where near the -2

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

    I was wrong, in stating what your points are, i would prefer writing my point as \(-15/9, 0) but in graphing it, -1.6 is fine.

  11. jim_thompson5910
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1440296802526:dw|

  12. jim_thompson5910
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1440296857983:dw|

  13. jim_thompson5910
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1440296883282:dw|

  14. 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.