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# Edexcel D1 - 17th June, 2016 [Exam discussion] watch

1. (Original post by boyyo)
umm, I kinda get what your doing here, could you explain it please?

I was thinking, the cost of y = 3x.
So the total cost would be, 3x+x ?

thelegend99
Sorry i meant that the objective line is P=3y+x (some1 correct me if i'm wrong)
2. (Original post by boyyo)
umm, I kinda get what your doing here, could you explain it please?

I was thinking, the cost of y = 3x.
So the total cost would be, 3x+x ?

thelegend99
Thanks for tagging me in!

So 4X is the total cost?
3. Having problems with the MS on 6b
It said that the cost is to be minimised and we should use point testing to find a value, but the points the MS used is clearly not the minimal cost? What about the x + y = 500, and the y = x -250 intersection? Surely thats smaller

Please may someone help with Question 4? I understand everything except why, in the last part, there are 119 pauses of two seconds. Where does the 119 come from?

Thanks
5. (Original post by Pablo Picasso)
Having problems with the MS on 6b
It said that the cost is to be minimised and we should use point testing to find a value, but the points the MS used is clearly not the minimal cost? What about the x + y = 500, and the y = x -250 intersection? Surely thats smaller

But that's not in the feasible region labelled R.
6. (Original post by NotNotBatman)
But that's not in the feasible region labelled R.
Thanks i love you
7. (Original post by Midgeymoo17)
I have a clash between Core 4 (AQA) and Decision 1 (Edexcel) with 25% Extra Time C4, 50% extra time in D1. Total exam time 4hrs 13 mins excluding my supervised rest breaks. Really looking forward to tomorrow.
Ouch I've got a friend who gets 50% extra time for both
8. (Original post by willmotg)

Please may someone help with Question 4? I understand everything except why, in the last part, there are 119 pauses of two seconds. Where does the 119 come from?

Thanks
It pauses between tests, so by the time it's on the 119th scanner it pauses 119 times, but it doesn't have to after the 120th, because it would have finished.
9. (Original post by target21859)
Ouch I've got a friend who gets 50% extra time for both
Yeah thats nasty. Hoever is he sitting C4 or M2 that clashes?
10. (Original post by NotNotBatman)
But that's not in the feasible region labelled R.
Will Not two activities mat share the same end & start time get you the mark for dummy questions reason
11. Could someone confirm that the way I did the quick sort would get full marks in an exam? My layout is different.
12. (Original post by Pablo Picasso)
Will Not two activities mat share the same end & start time get you the mark for dummy questions reason
I'm not sure what you mean.
13. I don't get why there's a third dummy (the one between G and I). Surely just a solid line would achieve the same thing? Help please!
Attached Images

14. (Original post by Nikhilm)
I don't get why there's a third dummy (the one between G and I). Surely just a solid line would achieve the same thing? Help please!
How would you show that K depends on G if it were a solid line?
15. (Original post by NotNotBatman)
How would you show that K depends on G if it were a solid line?
The dummy from G meeting H deals with that though. What about the third dummy

EDIT: ah I've realised my mistake, my way would also show that F is dependent on K which it isn't
16. Please could anyone explain question 5d https://drive.google.com/folderview?...jV3SzBabTE4NDQ how did we get the integer y value to be -4? Thanks
NotNotBatman
17. (Original post by Nikhilm)
The dummy from G meeting H deals with that though. What about the third dummy

EDIT: ah I've realised my mistake, my way would also show that F is dependent on K which it isn't
No, actually it's because you couldn't show K depends on H because the node halfway through G wouldn't be there.
18. (Original post by Pablo Picasso)
X>5
X<5

Just shade the opposite to what the arrow is saying
Ok but what if you've got X<4Y or something
19. How neat do gantt charts and scheduling diagrams have to be? Do you have to use a ruler?
How neat do gantt charts and scheduling diagrams have to be? Do you have to use a ruler?
preferential

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