Mathematics: Post your doubts here!

[drugdealar106]

found it in the addendum. thank you. i am doing the IGCSE's not O level thats why i thought this book is not the one to look at. but surprisingly enough the O level books i find are much better than IGCSE ones.

Im also doing IGCSE's but this book is what i studied for preparation IGCSE's books arent much helpful.. By the way u are welcome..

 

[exploded diper]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w08_qp_2.pdf
q 4. d
and
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s08_qp_1.pdf
q.24.iii
how to do both????

 

[drugdealar106]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w08_qp_2.pdf
q 4. d
and
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s08_qp_1.pdf
q.24.iii
how to do both????

Q4.d = 30/120 * 29/119 = 0.0609
(30/120 because there are 30 children with heights b/w 150-155... and 20/119 because 1 children is deducted as he is chosen as the 1st child.. )

Q24.iii = 7/50 * 6/49= 0.0171 (50 is the total number of children. this question needs to be solved in a similar way to the previous one)

 

[exploded diper]

Q4.d = 30/120 * 29/119 = 0.0609
(30/120 because there are 30 children with heights b/w 150-155... and 20/119 because 1 children is deducted as he is chosen as the 1st child.. )

yeah i also thought tht but in the ms something wierd is given...and only one mark is given if we do this....

 

[drugdealar106]

yeah i also thought tht but in the ms something wierd is given...and only one mark is given if we do this....

1 mark is for the solution and 1 mark for the answer..

 

[Evangeline]

Can someone please help me solve part b , thanks

 

[Evangeline]

What do you think is the hardest year in paper 2and 4 you solved?

 

[Ameer Wardi]

I think what you should do Eve is
M x M^(-1) = I , where I is the identity matrix for 2x2.

 

[Evangeline]

I think what you should do Eve is
M x M^(-1) = I , where I is the identity matrix for 2x2.

Thank you !

 

[Bloodserpent]

How am I supposed to
"Write down an equation in x and show that it simplifies to 2x^2 – 3x– 27 = 0" -0580_S13_42
Having hard time in Algebra..

 

[My Name]

part b plz explain !
answer is 2

 

[My Name]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w12_qp_22.pdf
question 15 part a
answer is 3
howwwwwwwwwww

 

[My Name]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_22.pdf
question 16
i know how to find distanc it is 130 m then wat???
plz reply with ez steps

 

[Mahwish Khalid]

Hi, I'm really confused with Circle theorems, Linear programming and Vectors. :/

 

[Bloodserpent]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w12_qp_22.pdf
question 15 part a
answer is 3
howwwwwwwwwww

Spoiler

Use= v-u/t
15-0/5=3
15m/s is the initial velocity of the car
0m/s is final velocity of the car
5s is time take for the car to stop (Taken from the graph 35-30)

 

[drugdealar106]

My Name ..
Q15:
find the distance of two rectangles, a trapezium and a triangle... in short find the area under graph...
distance= (25*10)+(1/2*25+15*10)+(10*15)+(1/2*5*15)
simplify it..

 

[Ameer Wardi]

View attachment 39586part b plz explain !
answer is 2

 

[My Name]

thank u soo much

 

[My Name]

Spoiler

Use= v-u/t
15-0/5=3
15m/s is the initial velocity of the car
0m/s is final velocity of the car
5s is time take for the car to stop (Taken from the graph 35-30)

thanku i dont know at went wrong with me ther!

 

[My Name]

My Name ..
Q15:
find the distance of two rectangles, a trapezium and a triangle... in short find the area under graph...
distance= (25*10)+(1/2*25+15*10)+(10*15)+(1/2*5*15)
simplify it..

can u plzanswer my other questions