Results are out! Find what you need...fast. Get quick advice or join the chat
Hey! Sign in to get help with your study questionsNew here? Join for free to post

OCR C1 Mark Scheme 16/05/12 (NOT MEI)

Announcements Posted on
  1. Offline

    ReputationRep:
    (Original post by As_Dust_Dances_)
    The total perimeter was 10y+3 and it had to be between 20 and 54 right?
    so 20<10y+3<54
    17<10y<51
    1.7<y<5.1
    no it was 10y +6 the perimeter!
  2. Offline

    ReputationRep:
    (Original post by As_Dust_Dances_)
    The total perimeter was 10y+3 and it had to be between 20 and 54 right?
    so 20<10y+3<54
    17<10y<51
    1.7<y<5.1
    total perimeter was 10Y+6
  3. Offline

    ReputationRep:
    (Original post by As_Dust_Dances_)
    The total perimeter was 10y+3 and it had to be between 20 and 54 right?
    so 20<10y+3<54
    17<10y<51
    1.7<y<5.1
    total perimeter was 10y+6
  4. Offline

    ReputationRep:
    (Original post by As_Dust_Dances_)
    The total perimeter was 10y+3 and it had to be between 20 and 54 right?
    so 20<10y+3<54
    17<10y<51
    1.7<y<5.1
    10y +6

    check out http://www.thestudentroom.co.uk/show....php?t=2002389

    unofficial mark scheme
  5. Offline

    ReputationRep:
    i got -7<x<4 and 1.7<x<5.1 ...
  6. Offline

    ReputationRep:
    (Original post by I_am_god_123)
    total perimeter was 10Y+6
    20< 10y + 6 >54!!!!!!!!!!!!!!!!!!!!!!!!!!! !!
  7. Offline

    ReputationRep:
    (Original post by max25)
    how did you find the last question?
    it was ok, pretty sure i got it right

    check out

    http://www.thestudentroom.co.uk/show....php?t=2002389
  8. Offline

    ReputationRep:
    (Original post by As_Dust_Dances_)
    For the perimeter question I got 17/10<x<51/10
    I thought it was in terms of y?

    I think I got something like this...

    34 <= 10y + 6 <= 54

    When simplified gets:

    28 <= 10y <= 48

    then:

    14/5 <= y <= 24/5
  9. Offline

    ReputationRep:
    (Original post by I_am_god_123)
    total perimeter was 10Y+6
    eeek apologies, wrong question hehe!were both right
  10. Offline

    ReputationRep:
    (Original post by I_am_god_123)
    nah it was -7<x<4
    but then x must be +ve
    for part i) (x+3)(4x)<112 right?

    so 4x^2 +12x-112<0

    x^2+3x-28

    (x+7)(x-4)

    You're talking about part 1 right, I was on about part 2..

    So yeah it is x<-7 and x>4
  11. Offline

    ReputationRep:
    (Original post by As_Dust_Dances_)
    for part i) (x+3)(4x)<112 right?

    so 4x^2 +12x-112<0

    x^2+3x-28

    (x+7)(x-4)

    You're talking about part 1 right, I was on about part 2..

    So yeah it is x<-7 and x>4
    But x cannot be negative - you cannot have a negative length as one of the sides was 4x negative dimensions are impossible so it had to be 0>x>4
  12. Offline

    ReputationRep:
    100 ****ing percentaaah!
  13. Offline

    ReputationRep:
    (Original post by Ilyas)
    100 ****ing percentaaah!
    check this out...
    http://www.thestudentroom.co.uk/show...389&p=37573386
  14. Offline

    ReputationRep:
    (Original post by max25)
    20< 10y + 6 >54!!!!!!!!!!!!!!!!!!!!!!!!!!! !!
    yaeh that's correct
  15. Offline

    ReputationRep:
    Question 6

    Equation of normal is

    4x - 6y -29 = 0
  16. Offline

    ReputationRep:
    would i lose a mark for having it as -4x + 6y + 29?
  17. Offline

    ReputationRep:
    (Original post by As_Dust_Dances_)
    for part i) (x+3)(4x)<112 right?

    so 4x^2 +12x-112<0

    x^2+3x-28

    (x+7)(x-4)

    You're talking about part 1 right, I was on about part 2..

    So yeah it is x<-7 and x>4
    this is right.
  18. Offline

    ReputationRep:
    (Original post by PhysicsMan)
    Question 6

    Equation of normal is

    4x - 6y -29 = 0
    This rings a bell has the gradient was like 2/3 or something?
  19. Offline

    ReputationRep:
    (Original post by As_Dust_Dances_)
    This rings a bell has the gradient was like 2/3 or something?
    Yep, the gradient of tangent was -3/2 therefore the gradient of normal is 2/3.
  20. Offline

    ReputationRep:
    (Original post by max25)
    20< 10y + 6 >54!!!!!!!!!!!!!!!!!!!!!!!!!!! !!
    That can't be correct (I didnt sit the paper though).. You are saying 20 < value > 54... so 20 is bigger than 54? 20 >54: you needed two statements.

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: May 16, 2012
New on TSR

Your TSR exam season toolkit

Everything you need to know about study help on TSR

Article updates
Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.