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

GoldRush18 Group Title

The circle C has equation (x-3)^2+(y-4)^2=25. i. State the radius and the coordinates of the centre of C. ii. Find the equation of the tangent at the point (6,8) on C. iii. Calculate the coordinates of the points of intersection of C with the straight line y=2x+3.

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @experimentX

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

    where do you have problem??

    • 2 years ago
  3. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    part 2

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

    let y=mx+c be equation of your tangent |dw:1336583832242:dw|

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

    find the value of m2 put the all the values m2, (6,8) in y = mx + c ... and find the value of c. then you have tangent!!

    • 2 years ago
  6. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok what about part 3

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

    \[ (x - 3)^2 + ((2x+3) - 4)^2 = 25 \] Find the value of x, and put the value of x in equation of circle ... and find corresponding y

    • 2 years ago
  8. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok im still on part 2 when it comes to graph and stuff i just cant get it thanks though

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

    you know how to find slope ... ?? from two points??

    • 2 years ago
  10. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    nope

    • 2 years ago
  11. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    is that the same thing as the gradient

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

    yes ... \[ m = \frac{y_2 - y_1}{x_2 - x_1}\]

    • 2 years ago
  13. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    and i got 4/3

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

    allright you know when two lines are perpendicular, if m1 and m2 be their gradient or slope then \( m_1 * m_2 = -1\) ??

    • 2 years ago
  15. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    no i didnt know that so what are the values i should include for this part

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

    m1 is just you calculated ... slope(gradient) of that radius!! m2 .. you have to calculate!! using the relation above.

    • 2 years ago
  17. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i got 0

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

    No .. you should get m1*m2 = -1 (m1 = 4/3) m2 = -3/4

    • 2 years ago
  19. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok i got it now

    • 2 years ago
  20. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    how do i get C which is the y intercept?

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

    you know one point ... so it satisfies that equation m = -3/4 (x,y) = (6,8) y = mx+c, c=??

    • 2 years ago
  22. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i got y=-3/4x+25/2

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

    Oo .. put the values of x=6 and y=8 since (x,y) is solution and we already know this!!

    • 2 years ago
  24. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok i understand now

    • 2 years ago
  25. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    im gonna try part c

    • 2 years ago
  26. GoldRush18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    and im stuck once more

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

    put y = 2x+3 on (x-3)^2+(y-4)^2=25 and find the value of x

    • 2 years 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.