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

eroshea

find the point where the normal line to y = x + root x at (4,6) crosses the y-axis.

  • 9 months ago
  • 9 months ago

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

    did you find the equation for the slope of the curve?

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

    wait.. i'll solve for the slope

    • 9 months ago
  3. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    take the derivative replace \(x\) by \(4\) that gives you the slope take the negative reciprocal, that give you the slope of the normal line use the point slope formula with the point \((4,6)\) to find the equation of the normal line \(y=mx+b\) then \(b\) is where it crosses the y axis

    • 9 months ago
  4. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    the value of b is the answer then?

    • 9 months ago
  5. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    yes, that is the y intecept

    • 9 months ago
  6. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    ok.. thanks.. i'll try solving for it

    • 9 months ago
  7. phi
    Best Response
    You've already chosen the best response.
    Medals 0

    Here is a plot of the scenario

    • 9 months ago
    1 Attachment
  8. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    thanks! what i got was 31/5 .. is this correct?

    • 9 months ago
  9. phi
    Best Response
    You've already chosen the best response.
    Medals 0

    how ?

    • 9 months ago
  10. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    i follow the steps satelite gave

    • 9 months ago
  11. phi
    Best Response
    You've already chosen the best response.
    Medals 0

    I think you wandered off the path...

    • 9 months ago
  12. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    why??

    • 9 months ago
  13. phi
    Best Response
    You've already chosen the best response.
    Medals 0

    see the plot I posted up above

    • 9 months ago
  14. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    where is the normal line there?

    • 9 months ago
  15. phi
    Best Response
    You've already chosen the best response.
    Medals 0

    the red line

    • 9 months ago
  16. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    so what do you think is wrong with my answer? is the steps given by satelite somehow have mistakes? i just followed it

    • 9 months ago
  17. phi
    Best Response
    You've already chosen the best response.
    Medals 0

    what did you get for the slope ?

    • 9 months ago
  18. phi
    Best Response
    You've already chosen the best response.
    Medals 0

    first, what did you get for the derivative?

    • 9 months ago
  19. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    owh wait.. i got a mistake

    • 9 months ago
  20. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    b = 46/5 .. i believe that is the correct answer now?

    • 9 months ago
  21. phi
    Best Response
    You've already chosen the best response.
    Medals 0

    yes, 9.2 which matches the plot

    • 9 months ago
  22. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    9.3 :)) thanks so much! help me again.. i'll post a question :)

    • 9 months ago
  23. phi
    Best Response
    You've already chosen the best response.
    Medals 0

    9.3 ?

    • 9 months ago
  24. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    yes.. divide 46 by 5 right ? then it will be 9... remainder is 15.. that will be 3.. so 9.3?

    • 9 months ago
  25. phi
    Best Response
    You've already chosen the best response.
    Medals 0

    5*9= 45

    • 9 months ago
  26. eroshea
    Best Response
    You've already chosen the best response.
    Medals 1

    lol.. i got a mistake again. sorry.. yes.. 9.2

    • 9 months 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.