Does anybody know if I'll still get 1 mark if for the Histograms I mixed up class width with the median..? :/
You are Here:
Home
> Forums
>< Study Help
>< Maths, science and technology academic help
>< Maths
>< Maths Exams
|
UNOFFICIAL MARKSCHEME Edexcel Maths Calculator paper 09/06/2016 watch
-
- Follow
- 1681
- 09-06-2016 17:08
-
- Follow
- 1682
- 09-06-2016 17:08
(Original post by blondebabe_xo)
What did people get for the sector question? -
- Follow
- 1683
- 09-06-2016 17:08
(Original post by NiamhM1801)
Think I got 99!
(Annoyingly missed the - sign off number 23 but hey what can you do) -
34908seikj
- Follow
- 28 followers
- 2 badges
- Send a private message to 34908seikj
Offline2ReputationRep:- Follow
- 1684
- 09-06-2016 17:08
(Original post by pelaitsc45)
Why didn't you take June 2015 into account? -
lifeofben3
- Follow
- 0 followers
- 0 badges
- Send a private message to lifeofben3
Offline0ReputationRep:- Follow
- 1685
- 09-06-2016 17:08
Does anyone happen to have any worked solutions?
-
esmeralda123
- Follow
- 2 followers
- 10 badges
- Send a private message to esmeralda123
Offline10ReputationRep:- Follow
- 1686
- 09-06-2016 17:08
(Original post by WaveyH)
If I correctly remember, the 2013 paper which was arguably the easiest paper ever was like 130 something for an A so you should be fine -
- Follow
- 1687
- 09-06-2016 17:09
(Original post by Brewah)
Let me know if you find out about mr kirbia please!!! ☺️
Its all we have for now -
Joshslater1998
- Follow
- 0 followers
- 0 badges
- Send a private message to Joshslater1998
Offline0ReputationRep:- Follow
- 1688
- 09-06-2016 17:09
Wat is it roughly to get a C grade??
-
DrPepper123
- Follow
- 0 followers
- 1 badge
- Send a private message to DrPepper123
Offline1ReputationRep:- Follow
- 1689
- 09-06-2016 17:09
(Original post by LokiiR)
um hang on, arent u meant to test 3.75 and 3.75 is less than 34, therefore x has to be in between 3.75 - 3.8 -
- Follow
- 1690
- 09-06-2016 17:09
(Original post by DrPepper123)
X3-5x=34.
Assuming X=3.7 would give an answer of 32.153, its difference from 34 being 1.847. However, assuming X=3.8 would yield an answer of 35.872, its difference from 34 being 1.872. Since the difference between 34 and the value of X as being 3.7 is smaller than the value at 3.8, X=3.7.
Hope this helps.
On the other hand, it is a fact that as the value of x increases in the equation, the numerical value also increases so the only way we can find whether x is closer to 3.7 or 3.8 is by using the midpoint 3.75, if the value is smaller than 45 when inputting 3.75 then we know that x is larger than 3.75, hence any number above 3.75 would be closer to 3.8 than 3.7 -
- Follow
- 1691
- 09-06-2016 17:09
(Original post by elli_s)
3 marks for stem and leaf diagram 1 mark for 9/20 -
- Follow
- 1692
- 09-06-2016 17:09
(Original post by Joshslater1998)
Wat is it roughly to get a C grade?? -
- Follow
- 1693
- 09-06-2016 17:09
(Original post by jtb135)
There was a big debate earlier, i put 3.7 but either way, a few marks cant make a massive difference -
- Follow
- 1694
- 09-06-2016 17:10
(Original post by Aol1)
Anyone know how many marks I will get for putting 9/20 for the 2nd question instead of 0.45? -
- Follow
- 1695
- 09-06-2016 17:10
cheers for this it put my mind to rest. just wondering about the marks for each one
-
- Follow
- 1696
- 09-06-2016 17:10
(Original post by Purpleunicorn197)
Hi I'm going to start and unofficial markscheme so add your answers
Reps are not necessary but would be appreciated
Sorry for the hold up with the questions
1. Order numbers correctly and include a key (Stem and leaf) (3 marks)
b) 9/20=
0.45 (2 marks)
2a. 5a*2b*3c =
30abc (1 mark)
b. Factorise fully 3y +6 =
3(y+2) (1 mark)
c. Expand x(x-3)=
x^2-3x (1 mark)
3. Perimeter of a rectangle with side lengths x and x+4 is 45
x+x+x+4+x+4= 4x+8
4x+8=45
4x=37
x=9.25 (3 marks)
4. Smallest packet was best value for money because it was cheapest per bag of crisps (4 marks)
5. 4 times as many red than green: There were 0.4 blue and 0.15 yellow.
0.4+0.15+4x+x=1
0.55+5x=1
5x=0.45
x=0.09
4x=0.36
Green- 0.09 Red- 0.36 (3 marks)
6a. Body mass index= m/h^2
Mass= 50kg
Height= 1.57m
20.3 (2 marks)
b. What mass will result in a BMI of 21 with a height of 1.8m
68.04kg (2 marks)
c. Tom's skis can be a maximum of 145% of his height what is their max. tenght (Tom is 1.8m)
2.61m (3 marks)
7. Trial and error. x^3-5x=34 with a number between 3 and 4
3.8 (4 marks)
8a. Photographs with of width 720 pixels and a height of 540 pixels what is the ratio width:height in its simplest form?
4:3 (2 marks)
b. The person now wants the ratio to be 2:3, without changing the width of the picture, what is the new height?
480 pixels (2 marks)
9.x= 124 degrees (4 marks)
10. Mean of grouper freq. table 396(freq.*midpoint total)/50 (freq. total)
7.92 (4 marks)
11. Colin's drive to work
£42.29 (5 marks)
12. The middle angle of a pentagon
x=144 degrees (4 marks)
13.
-2 -1 0 1 2
-1 3 1 -1 3 (2 marks)
Draw curve (2 marks)
14. steel bar with length of 120cm and a cross sectional area of 72cm^2 and a density of 8g/cm^3. A trolley can carry 250kg so how many bars can it carry?
3 Bars (5 marks)
15. Pauls buys a car worth 15,000 pounds and the value depreciates by 23% in the first year and 18% after the first year. Has Paul's car lost half of its value in theree years?
No, because 7766.22 was greater than 7500 pounds (4 marks)
16. Median on cumulative freq. graph
128g (1 mark)
b. Use graph to find interquartile range
11g (2 marks)
17. Triangle with sides 15.6cm (opp), 18(hyp). Angle is split into 2, 30 degrees and x degrees. the whole angle is 60.1 so
x=30.1 (4 marks)
18. 10a^5b^4 (2 marks)
b. y= 5p^2-x (3 marks)
19. 51 out of the 234 were maths in yr 12 so 50 * 51/234
11 males (2 marks)
20. 3x^2 + 6x -2
x= 0.29 or x= -2.29 (3 marks)
21. v=14 to 2 s.f u= 8.7 to 2 s.f
What is the upper bound of I when I= 5(v-u)
29.25 (3 marks)
22. Histogram -F.d- 1.6, 3.2, 2.4, 1.8, 0.3 (3 marks)
23. Perimeter of the shaded part of the sector.
Measurements were 4+4+5/2pi+25/6pi
28.9 (3 marks)
24a. Simplify (3-x)/3x^2-5x-12
-1/3x+4 (2 marks)
b. Write are one fraction in its simplest for (x/x-1)- (x/x+1)
2x/(x+1)(x-1) (3 marks)
25. Triangle with side lengths 7 and 8 finding the top angle using 1/2absinC , sine rule and cosine rule
80.4 (6 marks) -
pelaitsc45
- Follow
- 0 followers
- 11 badges
- Send a private message to pelaitsc45
Offline11ReputationRep:- Follow
- 1697
- 09-06-2016 17:10
(Original post by 34908seikj)
It's an anomaly, a big one. -
- Follow
- 1698
- 09-06-2016 17:11
(Original post by miles354)
However, your'e looking at an equation with the highest power being 3, the change in increase gains as you input a greater number so the fact that you said 3.8 has a larger difference still doesnt prove that it is further away from the true value.
On the other hand, it is a fact that as the value of x increases in the equation, the numerical value also increases so the only way we can find whether x is closer to 3.7 or 3.8 is by using the midpoint 3.75, if the value is smaller than 45 when inputting 3.75 then we know that x is larger than 3.75, hence any number above 3.75 would be closer to 3.8 than 3.7
The equation - x^3 - 5x = 34has a solution between 3 and 4
Use trial and improvement method to find this solution
Give your answer correct to 1 decimal place
You must show all your working
--------my answer--------
(before all this below i did 3.5 and 3.6)
3.7^3 - 5(3.7) = 32.153
34 - 32.153 = 1.847
So 3.7 is 1.847 away.
3.8^3 - 5(3.8) = 35.872
35.872 - 34 = 1.872
So 3.8 is 1.872 away.
This shows 3.8 being 0.025 further away than 3.7. 3.7 is closer.Therefore, the answer is 3.7, even though 3.75 gives an answer smaller than 34. -
34908seikj
- Follow
- 28 followers
- 2 badges
- Send a private message to 34908seikj
Offline2ReputationRep:- Follow
- 1699
- 09-06-2016 17:11
(Original post by pelaitsc45)
Yeah, I know, but the papers this year seem roughly the same difficulty. -
- Follow
- 1700
- 09-06-2016 17:12
-
University of Bath
-
University of Surrey
-
University of St Andrews
-
University of Leeds
-
University of Glasgow
-
University of Liverpool
-
Keele University
-
Mathematics (Foundation Entry)
Central Lancashire (UCLan)
-
Mathematics with Education (with Industrial Placement)
University of Derby
-
Queen Mary University of London
We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.
- SherlockHolmes
- Notnek
- charco
- Mr M
- Changing Skies
- F1's Finest
- rayquaza17
- RDKGames
- davros
- Gingerbread101
- Kvothe the Arcane
- TeeEff
- The Empire Odyssey
- Protostar
- TheConfusedMedic
- nisha.sri
- claireestelle
- Doonesbury
- furryface12
- Amefish
- harryleavey
- Lemur14
- brainzistheword
- Rexar
- Sonechka
- TheAnxiousSloth
- EstelOfTheEyrie
- CoffeeAndPolitics
- an_atheist
- Labrador99
- EmilySarah00