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Maths, Addmaths and Statistics: Post your doubts here!
- Thread starter OakMoon!
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Re: O'level Maths, Addmaths and Statistics help available he
what is the number of the question and what year?
what is the number of the question and what year?
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Re: O'level Maths, Addmaths and Statistics help available he
m=(9-10/8+4)=3/4
y=mx+c
Put the values of A
0=3/4(-4)+c
c=3
y=(3/4)x+3
(m of PQ)(m of AB)=-1
m of PQ=-4/3
y=(-4/3)x+c
Substitute values of P
10=-4/3 +c
c=34/3
y=(-4/3)x+34/3
Line AB and PQ intersect at C
Solve the two simultaneous equations..
4y=3x+12
and y=(-4/3)x+34/3
-16x/3 + 136/3 = 3x + 12
-16x+136=9x+36
25x=100
x=4, y=6
Therefore coordinates of C are (4,6)
It was a small mistake in the end!
HOPE THAT HELPED!!
Equation Of AB:xhizors said:
m=(9-10/8+4)=3/4
y=mx+c
Put the values of A
0=3/4(-4)+c
c=3
y=(3/4)x+3
(m of PQ)(m of AB)=-1
m of PQ=-4/3
y=(-4/3)x+c
Substitute values of P
10=-4/3 +c
c=34/3
y=(-4/3)x+34/3
Line AB and PQ intersect at C
Solve the two simultaneous equations..
4y=3x+12
and y=(-4/3)x+34/3
-16x/3 + 136/3 = 3x + 12
-16x+136=9x+36
25x=100
x=4, y=6
Therefore coordinates of C are (4,6)
It was a small mistake in the end!
HOPE THAT HELPED!!
- Messages
- 175
- Reaction score
- 9
- Points
- 28
Re: O'level Maths, Addmaths and Statistics help available he
i think u mean how to convert degree into radian...
for that if u have for example 60' (degrees)
60*(pi/180)=pi/3
nd the topix in add maths are almost same for both paper 1 and paper 2..so u cud prepare from both!
Muhammad Talha said:
i think u mean how to convert degree into radian...
for that if u have for example 60' (degrees)
60*(pi/180)=pi/3
nd the topix in add maths are almost same for both paper 1 and paper 2..so u cud prepare from both!
Re: O'level Maths, Addmaths and Statistics help available he
thanks budyy it really does Alhamdullilah and little help in it too Q11 ii a little explanation for k i have done with n
http://www.xtremepapers.me/CIE/index.ph ... 9_qp_1.pdf
tahatehseen said:Equation Of AB:xhizors said:
m=(9-10/8+4)=3/4
y=mx+c
Put the values of A
0=3/4(-4)+c
c=3
y=(3/4)x+3
(m of PQ)(m of AB)=-1
m of PQ=-4/3
y=(-4/3)x+c
Substitute values of P
10=-4/3 +c
c=34/3
y=(-4/3)x+34/3
Line AB and PQ intersect at C
Solve the two simultaneous equations..
4y=3x+12
and y=(-4/3)x+34/3
-16x/3 + 136/3 = 3x + 12
-16x+136=9x+36
25x=100
x=4, y=6
Therefore coordinates of C are (4,6)
It was a small mistake in the end!
HOPE THAT HELPED!!
thanks budyy it really does Alhamdullilah and little help in it too Q11 ii a little explanation for k i have done with n
http://www.xtremepapers.me/CIE/index.ph ... 9_qp_1.pdf
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Re: O'level Maths, Addmaths and Statistics help available he
xhizors The link you have posted is not working?
xhizors The link you have posted is not working?
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Re: O'level Maths, Addmaths and Statistics help available he
9 different books r to be arranged on a book-shelf.4 of these books were written by Shakespeare, 2 by Dickens and 3 by Conrad.
How many possible permutations r there if
a) the books by conrad must be next to each other?
b) the books by dickens are separated from each other?
c) the books by conrad r separated from each other???
please help me in this question..
9 different books r to be arranged on a book-shelf.4 of these books were written by Shakespeare, 2 by Dickens and 3 by Conrad.
How many possible permutations r there if
a) the books by conrad must be next to each other?
b) the books by dickens are separated from each other?
c) the books by conrad r separated from each other???
please help me in this question..
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Re: O'level Maths, Addmaths and Statistics help available he
24. (a) 3! x 7! = 30, 240.
(b) Possible permutations if the books by Dickens are next to each other = 2! x 8! = 80, 640.
=> Possible permutations if the books by Dickens are separated from one another = 9! - 80, 640 = 282, 240.
(c) I am not getting the same answer as the back of the book here.
Since there are 3 books by Conrad, the possible permutations that they would all be together is = 3! x 7! = 30, 240.
Now 2 books of Conrad can also be next to each other = 2! x 8! = 80,640.
So the possible permutations if Conrad's books are separated = 9! - (80, 640 + 30, 240) = 252, 000.
This is what I think and I may be wrong.
24. (a) 3! x 7! = 30, 240.
(b) Possible permutations if the books by Dickens are next to each other = 2! x 8! = 80, 640.
=> Possible permutations if the books by Dickens are separated from one another = 9! - 80, 640 = 282, 240.
(c) I am not getting the same answer as the back of the book here.
Since there are 3 books by Conrad, the possible permutations that they would all be together is = 3! x 7! = 30, 240.
Now 2 books of Conrad can also be next to each other = 2! x 8! = 80,640.
So the possible permutations if Conrad's books are separated = 9! - (80, 640 + 30, 240) = 252, 000.
This is what I think and I may be wrong.
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Re: O'level Maths, Addmaths and Statistics help available he
thank u so much understood part A and B .. but what to do with C?? how to get the same answer as at the back of the book?
abcde said:24. (a) 3! x 7! = 30, 240.
(b) Possible permutations if the books by Dickens are next to each other = 2! x 8! = 80, 640.
=> Possible permutations if the books by Dickens are separated from one another = 9! - 80, 640 = 282, 240.
(c) I am not getting the same answer as the back of the book here.
Since there are 3 books by Conrad, the possible permutations that they would all be together is = 3! x 7! = 30, 240.
Now 2 books of Conrad can also be next to each other = 2! x 8! = 80,640.
So the possible permutations if Conrad's books are separated = 9! - (80, 640 + 30, 240) = 252, 000.
This is what I think and I may be wrong.
thank u so much understood part A and B .. but what to do with C?? how to get the same answer as at the back of the book?
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Re: O'level Maths, Addmaths and Statistics help available he
I think the answer at the back of the book is wrong. I battled with this question before my exams, too and this is the best I could come up with. I hope some one else can help here. Best of luck!
I think the answer at the back of the book is wrong. I battled with this question before my exams, too and this is the best I could come up with. I hope some one else can help here. Best of luck!
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Re: O'level Maths, Addmaths and Statistics help available he
can u elaborate part c??? (3!*7!) is ok with me..but ur second step., i didn't understand...
abcde said:I think the answer at the back of the book is wrong. I battled with this question before my exams, too and this is the best I could come up with. I hope some one else can help here. Best of luck!
can u elaborate part c??? (3!*7!) is ok with me..but ur second step., i didn't understand...
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Re: O'level Maths, Addmaths and Statistics help available he
i just posted answer to this in another thread in which u asked about it
h3y all..
for quickest revision of relative velocity chek this link
http://www.numberskill.com/lessons-publ ... ity-part4/
i just posted answer to this in another thread in which u asked about it
h3y all..
for quickest revision of relative velocity chek this link
http://www.numberskill.com/lessons-publ ... ity-part4/
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Re: O'level Maths, Addmaths and Statistics help available he
for permutations: http://www.numberskill.com/lessons-publ ... ity-part4/
for permutations: http://www.numberskill.com/lessons-publ ... ity-part4/
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Re: O'level Maths, Addmaths and Statistics help available he
Ok. You have to find the possible permutations when ALL of Conrad's books are separated from one another. Since there are 3 books by him, there's a possibility that in some arrangements two of them are put together so that is why I also subtract (2! x 8!) from 9! .
Ok. You have to find the possible permutations when ALL of Conrad's books are separated from one another. Since there are 3 books by him, there's a possibility that in some arrangements two of them are put together so that is why I also subtract (2! x 8!) from 9! .
Re: O'level Maths, Addmaths and Statistics help available he
http://www.xtremepapers.me/CIE/index.ph ... 9_qp_1.pdfCaptainDanger said:
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Re: O'level Maths, Addmaths and Statistics help available he
This is how you do it!! Again, hope it helps!!
PS. save the image to ur desktop and then view it
xhizors said:
This is how you do it!! Again, hope it helps!!
PS. save the image to ur desktop and then view it
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Re: O'level Maths, Addmaths and Statistics help available he
here is the graph
xhizors said:
here is the graph
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Re: O'level Maths, Addmaths and Statistics help available he
http://www.xtremepapers.me/CIE/Cambridg ... _qp_12.pdf
Q8(ii) please...
http://www.xtremepapers.me/CIE/Cambridg ... _qp_12.pdf
Q8(ii) please...
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Re: O'level Maths, Addmaths and Statistics help available he
here is ur answer
here is ur answer
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Re: O'level Maths, Addmaths and Statistics help available he
thanks for help.. and now i want to help u the gradient is wrong its -0.5 and thus ur value of A is incorrect.. though method mark is secured by u
tahatehseen said:
thanks for help.. and now i want to help u
the gradient is wrong its -0.5 and thus ur value of A is incorrect.. though method mark is secured by u