Hey there! Sign in to join this conversationNew here? Join for free
    Offline

    16
    ReputationRep:
    (Original post by benitashrestha)
    I got like 90 and 6 :\\
    I got this too.


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    What values of x and y did people get for the last question to equal 88 but manage to keep 3x+4y less than 30?


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by breakeven)
    Did this one as a resit from January and I think it was a waste of £20. Didn't go well at all, hope you guys did good though!
    £20 wasted on me too, at least we have the Jan mark to fall back on :P
    Offline

    2
    ReputationRep:
    That went absolutely awful! I think I got a U ;(.
    Offline

    0
    ReputationRep:
    (Original post by Bloxorus)
    I got this too.


    Posted from TSR Mobile
    I would also say i got this too, but unfortunately i didn't haha. I don't have a clue how i got 90 and 5
    Offline

    16
    ReputationRep:
    (Original post by ben494)
    What values of x and y did people get for the last question to equal 88 but manage to keep 3x+4y less than 30?


    Posted from TSR Mobile
    I'm pretty sure I didn't get 88. I think I got 56 or something like that for the optimal graphical solution? I made an error on Simplex.
    • Thread Starter
    Offline

    1
    ReputationRep:
    I got 56 for both graphical and Simplex at (4,4.5)
    For an integer solution, I got 54 at (6,3).
    Offline

    2
    ReputationRep:
    (Original post by JimmyA*)
    I would also say i got this too, but unfortunately i didn't haha. I don't have a clue how i got 90 and 5
    Actually, now that I've read your post, I think I got 90 and 5 too? Because I remember calculating 30/6 to get 5?
    Offline

    0
    ReputationRep:
    (Original post by AlesanaWill)
    I'm pretty sure I didn't get 88. I think I got 56 or something like that for the optimal graphical solution? I made an error on Simplex.
    Yeah i got 56 as well but everyone else on here seemed to be getting 88. Glad somebody else got 56!


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    I think the 88 one was x=6 and y=8, could have been the other way round though. I'm fairly certain this is correct.
    Offline

    0
    ReputationRep:
    (Original post by AlesanaWill)
    I'm pretty sure I didn't get 88. I think I got 56 or something like that for the optimal graphical solution? I made an error on Simplex.
    yes the values were like 56, 9, 32, 4.5 (down the output column)
    I did in my graphical calculator so I still have the answers
    Offline

    0
    ReputationRep:
    (Original post by AlesanaWill)
    I'm pretty sure I didn't get 88. I think I got 56 or something like that for the optimal graphical solution? I made an error on Simplex.
    I got 56 too. (Messed up the LP though so couldn't verify it with my graph) I cant see it being 88 since if you solve the simultaneous equation 88=5x+3y and one of the other constraints, 3x+4y=30, you get a negative value for y, which doesn't comply with x,y,z >/= 0
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by kabutsu12)
    I think the 88 one was x=6 and y=8, could have been the other way round though. I'm fairly certain this is correct.
    How?
    It was outside the feasible region.
    Offline

    0
    ReputationRep:
    can anyone remember the constraint equations and the optimisation formula?
    Offline

    0
    ReputationRep:
    (Original post by kabutsu12)
    can anyone remember the constraint equations and the optimisation formula?
    P=5x+8y
    -8y+3x}-24
    3x+4y{30
    3x-2y{12

    I think

    } = greater than or equal to
    { = less than or equal to


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by kabutsu12)
    can anyone remember the constraint equations and the optimisation formula?
    I think it was Maximise P = 5x + 3y
    Subject to;

    3x-2y <12
    3y+4y <30
    3x-8y>-24
    x,y,z>0

    (all should be or equal to as well)
    Offline

    0
    ReputationRep:
    I got 56 as well at 4, 4.5
    and the integer one at 6,3

    i got 5 and 90 for the f and m values.
    I didn't think it went that bad but everyone else thought it was horrible
    Offline

    0
    ReputationRep:
    hmm, three of us got 86!
    Offline

    0
    ReputationRep:
    (Original post by DarkPeople)
    Actually, now that I've read your post, I think I got 90 and 5 too? Because I remember calculating 30/6 to get 5?
    Yep i did 30/6 aswell. We must have made a mistake somewhere. It meant we couldn't do the third part as i had no clue it was the LCM and HCF . I think i did awful!
    Offline

    0
    ReputationRep:
    how many marks were the sections of 6?
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

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