Mathematics: Post your doubts here!

[Fayax555]

17) a.
0.2x - 3 = 0.5x
0.2x - 0.5x = 3
-0.3x = 3
x = 3/-0.3
=-10

 

[amnakhan]

Can someone please help me with this question i'm really confused ... this is 0580_w07_qp_2 plus thers's no proper answer in the marking scheme

 

[amnakhan]

Can Someone please help me in this question its confusing plus theres no proper answer in the marking scheme.
BTW,this is an IGCSE question 0580_w07_qp2

 

[Fayax555]

whens novembers paper coming out?

Which year?

 

[ayeshaddy]

View attachment 33332

Can Someone please help me in this question its confusing plus theres no proper answer in the marking scheme.
BTW,this is an IGCSE question 0580_w07_qp2

16a) 64/ 0.125 = 512
Cube root 512 = 8

 

[Fayax555]

this year 2013 nov

Did you mean the answers. Because this is December. November session is already over.

 

[Abdul Majeed]

Can you please compile loci questions just from paper 2

 

[Mahmood Magdy]

Hey guys ! Simple question !
How do i draw a line of best fit ??

 

[CR7_Ozil10]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_ms_42.pdf
I really have a question in Qustion 2 (ii) I thought the determinants could only be found if the matrices were sqaure matrices, Please help!

 

[Rutzaba]

Hey guys ! Simple question !
How do i draw a line of best fit ??

best fit means that you plot on the points that are making sense and ignore any point that is either out of the way or is changing and ruining the shape of the graph.

 

[Mahmood Magdy]

best fit means that you plot on the points that are making sense and ignore any point that is either out of the way or is changing and ruining the shape of the graph.

Thank you ! Btw do we have to take the mean of the points and plot a line that passes over it ??

 

[Rutzaba]

Thank you ! Btw do we have to take the mean of the points and plot a line that passes over it ??

no

 

[Mohammed Emad]

Can someone please help me with the this: Question 9(b)
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w06_qp_2.pdf
It's a sequence question, the answer in the ms is 360x^2. I just can't find the method to it or it's nth term.

Thanks in advance.

 

[Mahmood Magdy]

Can someone please help me with the this: Question 9(b)
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w06_qp_2.pdf
It's a sequence question, the answer in the ms is 360x^2. I just can't find the method to it or it's nth term.

Thanks in advance.

Hey
So specially in sequences you need to pay lots of attention towards the numbers and the question itself. First of all they didn't ask you for the nth term so no need to find, it is even difficult to find it. However for the first sequence you need to add the two preceding terms. The second one , the powers of x decrease by one as you go further therefore it will be x^2 . Moving on to the numbers, if you divide 120 by 30 you get 4 , if you divide 30 by 6 you get 5 and finally if you divide 6 by 1 you get six. So the number get multiplied by numbers which go on decreasing by 1

Therefore if you multiply 120 by 3 you get 360. And as the powers decrease you get x^2 . Put them together you get 360x^2 .

 

[Mohammed Emad]

Hey
So specially in sequences you need to pay lots of attention towards the numbers and the question itself. First of all they didn't ask you for the nth term so no need to find, it is even difficult to find it. However for the first sequence you need to add the two preceding terms. The second one , the powers of x decrease by one as you go further therefore it will be x^2 . Moving on to the numbers, if you divide 120 by 30 you get 4 , if you divide 30 by 6 you get 5 and finally if you divide 6 by 1 you get six. So the number get multiplied by numbers which go on decreasing by 1

Therefore if you multiply 120 by 3 you get 360. And as the powers decrease you get x^2 . Put them together you get 360x^2 .

Impressive, that makes sense, I have no idea how I would notice of such a pattern in my upcoming exams(this year).
Tango Mike

 

[Mahmood Magdy]

Impressive, that makes sense, I have no idea how I would notice of such a pattern in my upcoming exams(this year).
Tango Mike

Dont worry ! I am giving maths also this year with you BTW Which variant are you and which school/country ??

 

[Mohammed Emad]

Dont worry ! I am giving maths also this year with you BTW Which variant are you and which school/country ??

Nice, atleast I know I'm not alone, I'm taking paper 2 and 4 in maths. I'm in UAE. What about you?

 

[Mahmood Magdy]

Nice, atleast I know I'm not alone, I'm taking paper 2 and 4 in maths. I'm in UAE. What about you?

I am also from uae

 

[RahatMT]

Hi! umm im having difficulty solving this question,
The scale of a map is 1: 1000. What are the actual dimensions of a rectangle which appears as 4cm by 3cm on the map? What is the area on the in cm^2? What is the actual area in m^2?

 

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