Mathematics: Post your doubts here!

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

hello ,, i'm stuck on qsn 6 o/n 2007 the qsn asks me to draw accurately but i don't have the height between the two parallel lines in order to draw the line with 30m long and i also don't know the angle between line ab and bd .i can draw it by using trigonometry but i sholdn't use it. so please help
http://www.xtremepapers.me/CIE/Cambridg ... 7_qp_4.pdf

You don't need all that for part (a). First make AB 13 cm long and make the angle BAD. Placing your compass at B, draw an arc with radius 15 cm and check where it intersects line Ad. That would be point D. You do know that ADC = 180* - 80* = 100* (interior angles) so make this angle and extend the line from D in the direction of this angle. Placing your compass at D, make a 9 cm long arc and check where it intersects your line. That will be point C. Then all you have to do is join the points with a ruler.
Hope this helps

 

[JmCullen]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Hey.. can i know when should we simplified the fraction in prababilities? for example, 3/6 = 1/2
because sometimes i check the answer key, they don't simplify.. so when should we do so?
if we don't simplify, we our marks be deduct?

 

[Ramosk95]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

if you can see oe which means or equivilant then your answer is right
btw thnx abcde

 

[JmCullen]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

if you can see oe which means or equivilant then your answer is right

btw, is this to me? haha.. kinda confused..
how if, there is no oe.. i mean, in the answer key, only the answer and without thing like "oe"..
is that correct?

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

JmCullen, yes it's correct and oe is invariably present!
You're welcome Ramosk95!

 

[JmCullen]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

abcde, ok.. so if i write either 2/6 or 1/3 the answer is still correct?
thanks alot! i really confuse in this part..

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Of course it is. But if the question says simply your answer , it should be 1/3. Always write answers in their lowest terms to be on the safe side. Good luck!

 

[JmCullen]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

ok! thanks alot! really..
i'm having my paper 4 e-math, tomorrow. haha.. :%)

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Best of luck! Be confident.

 

[MrKiller009]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Hi guys, Can anyone give me some notes in probability? Because i always stuck in such questions and i don't know how they are solved ... i would be so happy if you helped me! thanks a lot. !

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

This could help you: http://www.astarmathsandphysics.com/o_l ... grams.html

 

[student92]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

help
mj09 p4 q11 d ii
http://www.xtremepapers.me/CIE/Cambridg ... 9_qp_4.pdf
how do we solve this
thanks

 

[BishoyGamil]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

can anybody give me tips or notes or what ever for the sequence and mensuration please quick as i ll have the exam tomorrow thanks in advance

 

[WayneRooney10]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Whats the formula for Compound Interest!!!?

 

[irlzs95]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

hey ,
couldnt anyone help me in this

Q10 c(i)
http://www.xtremepapers.me/CIE/Cambridg ... _qp_42.pdf



i dd the simultenous equation but couldnt get the answer??

 

[irlzs95]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Whats the formula for Compound Interest!!!?

Ax(1+i)^t

the amount multiplied by the the addition of 1 nd intrest , powered to the time
time in years , intrest in decimal

 

[CaptainDanger]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Whats the formula for Compound Interest!!!?

M = P( 1 + i )n

M is the final amount including the principal.

P is the principal amount.

i is the rate of interest per year.

n is the number of years invested.

can anybody give me tips or notes or what ever for the sequence and mensuration please quick as i ll have the exam tomorrow thanks in advance

Check here... CLICK

 

[irlzs95]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

hey ,
couldnt anyone help me in this

Q10 c(i)
http://www.xtremepapers.me/CIE/Cambridg ... _qp_42.pdf



i dd the simultenous equation but couldnt get the answer??

Can someone helpt plz?

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

hey ,
couldnt anyone help me in this

Q10 c(i)
http://www.xtremepapers.me/CIE/Cambridg ... _qp_42.pdf



i dd the simultenous equation but couldnt get the answer??

Can someone helpt plz?

1/p x 3 x (3 - q) = 0
=>3( 3 - q) =0
=> q =3.
1/p x 4 x (4 - 3) = 2
=>2 p = 4
=> p = 2
I've just substituted values from the table into the equation. Hope it helps!

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

I'm sorry! Thank you for pointing it out. Silly error. I'll edit my post.