Mathematics: Post your doubts here!

[ahmadumar]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s03_qp_2.pdf
In question 18, they are asking for the scale in from 1:n
Where AB is given 100m.

What I thought,
Since 1m = 100 cm
then 100m = 10,000 cm.
Which is not correct, unfortunately.

these are the answers to those in http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w12_qp_22.pdf

 

[ahmadumar]

Please Help me in question 9 in may june 2013 p42 i need an explanation
please help

its Q9 a part. i'll answer rest later. i've got a test tomorrow. hope some1 else answers it before me

 

[My Name]

Are the May/June papers harder or the Oct/Nov? What do you guys think?

I WANTO KNOW THE ANSWER TO THAT QUESTION tooooo

 

[Mahwish Khalid]

Please help.

 

[DeadlYxDemon]

Hello!
I need a explanation of Question 9, M/J 2013 , variant 22! its urgent as my maths p22 is on Tuesday!

 

[DeadlYxDemon]

Please I need an immediate reply!

 

[Mahwish Khalid]

Thought blocker
Awesome12
shoaib672002
Solve the inequality
-7<=2-3x<23

What's the answer?

 

[shoaib672002]

What's the answer?

(−7,3]

 

[Rahatara Sadique]

it's correct thanks alot, I'll be asking you more question if you don't mind

Sure! Glad that I was helpful.

 

[Rahatara Sadique]

it's correct thanks alot, I'll be asking you more question if you don't mind

Sure! Glad that I was helpful.

 

[Awesome12]

The length of a train is 120m travelling at a speed of 144km/hr passes a bridge of length 20m, calculate the time taken by the train to pass the bridge. (3)
shoaib672002
Awesome12


NEED HELP FAST

A good question
Convert the speed in to m/s which is 40 m/s
Now it will cover 20 m in half a second. The train is 120 m. So we divide 120/20 = 6
The time taken for the entire train to pass the bridge is 6 * 0.5 = 3s

 

[Fa6oom Al-Tamimi]

Please I need an immediate reply!

1 litre= 1000cm^3

so 65 litres= 65000cm^3 and 0.05= 50cm^3

Take the car as a cuboid and its lengh is 440cm (1m=100cm)

Now use this formula for volumes of similar shapes : Volume 1/Volume 2 = (length1/length2)^3

65000/50= (440/x)^3

Continue solving it youll get 40.3cm

I hope its clear .

 

[Sohel d assassin]

guys im stuck in a qsnt !! paper 0580/22/oct-nov/2011 !! .. in qsnt 10 !! the sum is 3/x+10 - 1/x+4 !! ... 3 and 1 is in the numerator and X+10 and X+4 is in denominator !! ... they r saying write as a single fraction in its simplest form . HELP PLZZ !!

 

[Sohel d assassin]

UMAR help me out i thnk ur on9 !!

 

[Thought blocker]

Thought blocker
Awesome12
shoaib672002
Solve the inequality
-7<=2-3x<23

you need steps or u got it ?

 

[Thought blocker]

Given that x^2+6x+c=(x+d)^2+10
a) find values of c and d
b) write down the minimum value of x^2+6x+c

shoaib672002
Awesome12
this i think is a tough question

a)
is d = -3 and c = 19 ?
b)
minimum value is 10
?

 

[Thought blocker]

can u plz explain how is minimum value 10

For a minimum point, f(x) should be one one function. so when f(x) is 10 it is a one one function

 

[Thought blocker]

still didn't got u

Hope now you get it

 

[Thought blocker]

but by this graph how do we get it 10

come here http://www.twiddla.com/1606840 I'll explain it to you

 

[shoaib672002]

What that site its always empty

come here http://www.twiddla.com/1606840 I'll explain it to you