I'm also doing this module! And I absolutely hate it as it's so dull and boring😠. I didn't feel too bad about the exam until we did the June 2014 mock in class on Wednesday. What was all the algebra about? That was the worst D2 paper ever for me.

Reply 25

2014_GCSE

3

On June 2011, in the Simplex question (q 4) (http://filestore.aqa.org.uk/subjects/AQA-MD02-W-QP-JUN11.PDF)

I have ended up with these simultaneous equations:

z - 1/4u = 3/4

t - 4u = 10

-2y - 5/3u = -5

How do I find any of the letters from these? :s-smilie:

(edited 8 years ago)

Reply 26

Mitzy09

OP

9

Original post by 2014_GCSE

On June 2011, in the Simplex question (q 4) (http://filestore.aqa.org.uk/subjects/AQA-MD02-W-QP-JUN11.PDF)

I have ended up with these simultaneous equations:

z - 1/4u = 3/4

t - 4u = 10

-2y - 5/3u = -5

How do I find any of the letters from these? :s-smilie:

I would help you but I haven't gone over this yet... :redface:

Once I've done it, i'll try and help out.

Reply 27

Mitzy09

OP

9

Hey guys I'm a a bit stuck on the shading of the graph for game theory, I always shade it in the wrong direction- any tips greatly appreciated thanks!!

(edited 8 years ago)

Reply 28

Tibooster

1

Anyone got any tips on checking answers? So many times I've thought I've got the right answer and it's completely wrong.

Reply 29

Tibooster

1

Do people use pencil or pen for dynamic programming tables and flow augmenting? I know I probably should use pen but if I mess up you can't really start again

Reply 30

furryface12

21

Original post by Tibooster

Do people use pencil or pen for dynamic programming tables and flow augmenting? I know I probably should use pen but if I mess up you can't really start again

Think I might just stick to pencil, particularly for flow augmenting :s-smilie:

Same for simplex tableau, I always seem to mess up. I have a feeling stupid mistakes that I carry through the question are going to be my downfall on this paper, and timing :redface:

Posted from TSR Mobile

Reply 31

Engineering Lad

5

Hello everyone,

On question 3)b) of June 2014, it says to solve the question by inspection. I can solve it by flow augmentation, but not by inspection. Can anyone explain how this is done by inspection?

Reply 32

Mitzy09

OP

9

Can someone help me with this question?
http://filestore.aqa.org.uk/subjects/AQA-MD02-W-MS-JUN10.PDF

Q1B, why cant BEHKL be a crticial path too?

Reply 33

FeelsToWaltz

2

Original post by Engineering Lad

Hello everyone,

On question 3)b) of June 2014, it says to solve the question by inspection. I can solve it by flow augmentation, but not by inspection. Can anyone explain how this is done by inspection?

Just by painstakingly writing numbers on each arc to ensure that the flow into a node equals the flow out of the node. That question is complete ****, such a waste of time.

Reply 34

jessli

Original post by Mitzy09

Hey guys I'm a a bit stuck on the shading of the graph for game theory, I always shade it in the wrong direction- any tips greatly appreciated thanks!!

Shade the area under ALL the lines, then look for the highest vertex :smile:

Reply 35

Mitzy09

OP

9

Original post by jessli

Shade the area under ALL the lines, then look for the highest vertex :smile:

Thankyou!

Reply 36

2014_GCSE

3

Can someone please explain question 8 c) on June 2014 to me.
Don't understand it at all! Thanks.

http://filestore.aqa.org.uk/subjects/AQA-MD02-QP-JUN14.PDF

(edited 8 years ago)

Reply 37

swaggersaurusrex

how do you 3a on june 2014?

Reply 38

2014_GCSE

3

Original post by swaggersaurusrex

how do you 3a on june 2014?

The value of a cut is the total of all the values of the lines that are crossing the cut from the source to the cut.

So for this question:

5 + 5 + 10 + 10 + 10 + 10 + 10 = 60

and

20 + 10 + 10 + 10 + 30 = 80

Reply 39

swaggersaurusrex

Original post by 2014_GCSE

The value of a cut is the total of all the values of the lines that are crossing the cut from the source to the cut.

So for this question:

5 + 5 + 10 + 10 + 10 + 10 + 10 = 60

and

20 + 10 + 10 + 10 + 30 = 80

thanks, but which '10' is not included when calculating the cut?

Aqa decision 2 wednesday 24th june 2015

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