Mathematics: Post your doubts here!

[always-smile :)]

Can you restart it?

HOOW??

 

[always-smile :)]

aoa wr wb..
may i know what's the problem?

I Make the same steps with the same numbers and my answers are completely different from the mark scheme

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

I Make the same steps with the same numbers and my answers are completely different from the mark scheme

well...press shift then 9 and then 3....
try after that

 

[always-smile :)]

well...press shift then 9 and then 3....
try after that

at last the asnswer appeared
thnx aloooooooooooooooooooooot you saved me

 

[always-smile :)]

can some1 tell me how the line y=g(x)-10 parallel to y=g(x) Q6 d
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w09_qp_4.pdf

 

[Yousif Mukkhtar]

can some1 tell me how the line y=g(x)-10 parallel to y=g(x) Q6 d
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w09_qp_4.pdf

The gradient is the same, the only different is that the y values are different.

 

[always-smile :)]

The gradient is the same, the only different is that the y values are different.

when we draw the line we make substitution with point from the graph right???
i did so and it didn't seem parallel !!

 

[Yousif Mukkhtar]

when we draw the line we make substitution with point from the graph right???
i did so and it didn't seem parallel !!

What I did was=
1. Take two points such -5 and 2
2. See where they meet the y-axis
- 5 meets 40
2 meets 10

3. And then you can see that g(x) equals to y. So for g(x)-10 equals y-10.

Result- 40-10= 30 and 10-10=0

So the line will go through (-5,0) and (2,0)

 

[Yousif Mukkhtar]

Just remember to make a line you need at least two points.

Here you got two x values. You can get the corresponding y values easily by subtracting 10.

 

[always-smile :)]

What I did was=
1. Take two points such -5 and 2
2. See where they meet the y-axis
- 5 meets 40
2 meets 10

3. And then you can see that g(x) equals to y. So for g(x)-10 equals y-10.

Result- 40-10= 30 and 10-10=0

So the line will go through (-5,0) and (2,0)

ok i got it
can you explain c pllz

 

[Lost_Life]

Assalam-o-alaikum wr wb..
(i) POS=180-42-42=96 (OPS and OSP will be equal as it is an isosceles triangle (radius))
(ii) PRS will be half of POS i.e 96/2=48
(iii) SPQ=180-(35+48) (cuz it is a cyclic quadrilateral and opposite angles add upto 180)
(iv) PSQ=PRQ=35 (angle on the same arc)

hope it helps

Oh i see... thanks

 

[Yousif Mukkhtar]

ok i got it
can you explain c pllz

Find the gradients using the points A and B only. That is what it means actually.

 

[Lost_Life]

Um, i've got another question
I have a mammoth-sized problem with scales
see if they asked us to find the scale in the form of 1:n , given that we have 4.5 cm and 90km

so what i did was i converted the 4.5cm into km
then i divided the ratios 0.045/90 to get 1 : 20000
but the answer gave 1 :2000000
??? can somebody explain?

 

[anooshraja]

1. q1) A rectangular-based open box has external dimensions of 2x cm, (x ! 4) cm and (x ! 1) cm.
   (a) (i) Write down the volume of a cuboid with these dimensions. [1]
   (ii) Expand and simplify your answer. [1]
   (b) The box is made from wood 1 cm thick.
   (i) Write down the internal dimensions of the box in terms of x. [3]
   (ii) Find the volume of the inside of the box and show that the volume of the wood
   is 8x2 ! 12x cubic centimetres. [3]
   (c) The volume of the wood is 1980 cm3.
   (i) Show that 2x2 ! 3x 0 495 # 0 and solve this equation. [5]
   (ii) Write down the external dimensions of the box.
   only part bi and bii
   
   q2) Maria returns from the waterfall but this time she walks the 10 kilometres at an average speed of
   (x + 1) kilometres per hour. The time of the return journey is 30 minutes less than the time of the first
   journey.
   Write down an equation in x and show that it simplifies to x2 + x – 20 = 0.
   
   
   q3) At the first stop, 37.5% of the adults and 1/3 of the children get off the train.
   20 adults and x children get onto the train.
   The total number of passengers on the train is now 200.
   (i) How many children got off the train? [1]
   (ii) How many adults got off the train? [1]
   (iii) How many adult passengers are on the train as it sets off again? [1]
   (iv) What is the value of x?
   
   http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s05_qp_4.pdf
   question 6 ci,ii
   
   http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w04_qp_4.pdf
   question7​
   anooshraja, Today at 2:45 AM​

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   anooshraja
   
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   Question 4dii​

   :http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w04_ms_4.pdf​

   plz kindly heip me iknow it's too question bt still help​

   June06 questin 3cii,iii​

 

[Lost_Life]

Um, i've got another question
I have a mammoth-sized problem with scales
see if they asked us to find the scale in the form of 1:n , given that we have 4.5 cm and 90km

so what i did was i converted the 4.5cm into km
then i divided the ratios 0.045/90 to get 1 : 20000
but the answer gave 1 :2000000
??? can somebody explain?​

​

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

at last the asnswer appeared
thnx aloooooooooooooooooooooot you saved me

haha make sure during your exam you have the correct 'degrees mode'....

i will suggest everyone to clear/refresh their calculator b4 going to their exam

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

Oh i see... thanks

its okie

 

[always-smile :)]

Um, i've got another question
I have a mammoth-sized problem with scales
see if they asked us to find the scale in the form of 1:n , given that we have 4.5 cm and 90km

so what i did was i converted the 4.5cm into km
then i divided the ratios 0.045/90 to get 1 : 20000
but the answer gave 1 :2000000
??? can somebody explain?

make the opposite
convert 90 km to cm and you will get it right

 

[GetSomeLife]

Um, i've got another question​

I have a mammoth-sized problem with scales​

see if they asked us to find the scale in the form of 1:n , given that we have 4.5 cm and 90km​

​

so what i did was i converted the 4.5cm into km​

then i divided the ratios 0.045/90 to get 1 : 20000​

but the answer gave 1 :2000000​

??? can somebody explain?​

​

4.5 cm = 0.000045 km NOT 0.045
so:
0.000045 : 90
1 : 2000000

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

Um, i've got another question​

I have a mammoth-sized problem with scales​

see if they asked us to find the scale in the form of 1:n , given that we have 4.5 cm and 90km​

​

so what i did was i converted the 4.5cm into km​

then i divided the ratios 0.045/90 to get 1 : 20000​

but the answer gave 1 :2000000​

??? can somebody explain?​

​

4.5 cm isn't 0.045 km...
first convert it to metres and then kilometres..
i.e 4.5/100=0.045 m
0.045/1000=0.000045 km
now divide it by 90..you will get the answer