Mathematics: Post your doubts here!

[uzair shahid]

shear stretch explain!

 

[Sam Ivashkov]

Hi. Can anyone help me out? In variant 22 of this paper http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s09_qp_2.pdf how are we supposed to do question 16? I thought we are supposed do to the locus equidistant from two points/locus of a line segment, but the mark scheme (http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s09_ms_2.pdf) has something about angle bisectors. :/

 

[Weirdoatlarge777]

Question 19b please
http://papers.xtremepapers.com/CIE/...s (with coursework) (0581)/0581_s10_qp_21.pdf

 

[Lockedin]

I need help with a few questions !! i'm failing math, and need an A, any tips? :/
i know the answers but don't understand how to get there.
any help on any question is greatly appreciated

1) Question : 8, 9(b), 19 (a) & (c)
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s03_qp_2.pdf

2) Question: 7 (b), 8, 17 (b), 18 (b), 20 (b), 23
http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_w05_qp_2.pdf

 

[fbyfbyfby]

shear stretch explain!

even me ı cant understand shear :S

 

[Lockedin]

even me ı cant understand shear :S

 

[fbyfbyfby]

thnx u very much

 

[tweetie]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s12_qp_41.pdf
ques 2b i nd ii

 

[fbyfbyfby]

ahh..thanks!

A CAMPANY MAKES SOLID CHOCLATE EGGS N THEIR SHAPES R MATHEMATICAALY SIMILARÇTHE SMALL EGGS HEIGHT IS 2 cm and BIGGER ONE IS 6 cm THE MASS OF THE SMALL ONE IS 4 GR CALCULATE THE LARGER EGGS MASS..?

 

[tweetie]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s12_qp_41.pdf
6b ii
plsssssssssssssssssssss help

 

[Lockedin]

1) Question : 8, 9(b), 19 (a) & (c)

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s03_qp_2.pdf

2) Question: 7 (b), 8, 17 (b), 18 (b), 20 (b), 23
http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_w05_qp_2.pdf​

 

[sweetiepie]

https://www.xtremepapers.com/community/threads/useful-stuff-compiled.10273/ Notes Added Check Out Hope This Helps

 

[fbyfbyfby]

eby bro! for mass you have to use the ratios like a volume so ... 6/2 = 3... (3)^3 = 27 is the ratio value of volumes! so to find the big one you multiply the small volume by 27!

thnx

 

[Lockedin]

if u have any more Qs! add me on skype! and i will answer all of them ! ... name RAMIE MAJED

answer the questions i posted above ?

 

[Lockedin]

your questions are very easy! if u just read them again u can figure them out! if u can't solve these questions u should consider studying again! sorry im not going to waste my time! if u get something worth solving i will be gladly helping you out!

okay i understood them, thanks anyway

 

[tweetie]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s12_qp_21.pdf
q-15 b and 20 and 21-c PLSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS HELP

 

[Ibtizam]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s12_qp_21.pdf
q-15 b and 20 and 21-c PLSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS HELP

for qstn 20
use trigonometry to workout length PT and PR
and then use d arc formula:204/360 * 2*pi*5 =17.8
then add PT +PR +17.8 =64.9

 

[Carbonate]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s12_qp_21.pdf
q-15 b and 20 and 21-c PLSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS HELP

15b) use the ratios rule, square the ratio 1:5 and you will get 1:25 and 12:x, solve for x ie 300

21c) draw a tree diagram with three branches(RBG) and you will find 3 probabilities: RG(3/9*2/8),BG(2/9*4/8) and G and NOT G(ie blue+red(4/9*3+2/8)
that should give you 5/9

 

[lordIceAndFire]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s08_qp_2.pdf
question 16
guys..i got the answer right (using calculator) but i dont know the working
care to show me?

 

[notnek01]

guys for shear and stretch! don't learn the way because its complex learn it in the matrix form! and multiply their matrix by the points the lay in that shape!

What if a question asks you to describe a shear/stretch?

Knowing the matrices is a good idea but you also need to know how to recognise these transformations and find the scale factor/invariant line.