Mathematics: Post your doubts here!

[ahmadumar]

can someone please solve this thanks.

 

[ahmadumar]

View attachment 41294
this too plsss

 

[ahmadumar]

Everybody Best Of Luck with ur exams
My prayers are with u all out there May Allah give u all success with A*s and Distinctions
I'm sorry if i by mistake didnt answer anyones or forgot to answer anyones question
Remember me in ur dua
Best of Luck to all

 

[princess sofia]

cn any1 plz ans thx quick ................

 

[QatarOwnz]

http://puu.sh/8Af3W.png

 

[a_wiserME!!]

ahmadumar
Awesome12
i even need answer to 2nd pic 1st part forgot to underline
View attachment 41306 View attachment 41307

16 (a).. AB=coordinates of B - coordinates of A
16.(b).. use d formula for the modulus of vector square root of (x^2 +y^2) and use ur first answer for this
16.(c) find AC+ d coordinates of A
hope i helped

 

[Xylferion]

cn any1 plz ans thx quick ................View attachment 41302

Alright here goes.

First of all part a) is asking you to convert from kilometres per hour to metres per second.

1 kilometre= 1000 metres.
144 kilometres = 140 x 1000 = 144,000 metres

now convert the hours to seconds.

1 hour = 60 minutes. 1 minute = 60 seconds.

So 60 minutes = 60 x 60 seconds = 3600 seconds.

144,000 / 3600 seconds = 40 metres / second.

Now for part b), it's basically asking you how long it will take for <--------------------------> to pass <------>

The train is 120 "metres", but the speed it is traveling at is in kilometres/hour.

You already converted the speed in part a) the speed the train is traveling at is 40 m/s.

Speed = Distance / Time
Time = Distance / Speed
Distance = Speed x Time

We need to find the time taken for it to pass the bridge which is 20m, So use the time formula.

Your distance to cover is the length of the train + the width of the bridge. That's the total distance.

Distance = 120 + 20 = 140

The speed at which it's traveling at is 40 m/s.

So Time = 140 / 40 = 3.5 seconds.

Hope that helped.

 

[a_wiserME!!]

thanx but can u plz explain the first part like always to find column vector we do this and last part i couldn't get it

ya d first part is wat u do always for the column vector..n d last part if d ques askd "find AC" den d answer wld have been (18, 12) but as dey have askd d coradinates of C which will b AC plus A b'coz for point C u'll have 2 start counting d points from A... so it will b AC+coordinates of A...did u gt it?? Actually i'm really bad @ explaining stuff especially dis way...sooo sry if it dint help...i tried my best

 

[princess sofia]

Alright here goes.

First of all part a) is asking you to convert from kilometres per hour to metres per second.

1 kilometre= 1000 metres.
144 kilometres = 140 x 1000 = 144,000 metres

now convert the hours to seconds.

1 hour = 60 minutes. 1 minute = 60 seconds.

So 60 minutes = 60 x 60 seconds = 3600 seconds.

144,000 / 3600 seconds = 40 metres / second.

Now for part b), it's basically asking you how long it will take for <--------------------------> to pass <------>

The train is 120 "metres", but the speed it is traveling at is in kilometres/hour.

You already converted the speed in part a) the speed the train is traveling at is 40 m/s.

Speed = Distance / Time
Time = Distance / Speed
Distance = Speed x Time

We need to find the time taken for it to pass the bridge which is 20m, So use the time formula.

Your distance to cover is the length of the train + the width of the bridge. That's the total distance.

Distance = 120 + 20 = 140

The speed at which it's traveling at is 40 m/s.

So Time = 140 / 40 = 3.5 seconds.

Hope that helped.

thnx

 

[a_wiserME!!]

thanx but they havent given us c so how can we first find out c

c d statement b4 d ques it says AC=2AB right?? multiply ur answer in (a) wid 2..now d answer dt u gt will b AC...den add dis AC wid d cordinates of A n u will get C...dey are asking us C so hw will dey give us dt

 

[saif mahmoud]

-2a -2c

 

[Xylferion]

saif mahmoud
Awesome12
Thought blocker
ahmadumar
View attachment 41314

There's two ways to do it. Go under E and then up or go above E and then down.

First, Start at B. You want to get directly above D, so you go -a two times. = -2a.

Secondly to go from this point to E, you have to go -c twice. = -2c.

Final vector = -2a - 2c

 

[princess sofia]

thx one also plz

 

[Awesome12]

saif mahmoud
Awesome12
Thought blocker
ahmadumar
shazmina
View attachment 41314

 

[Xylferion]

View attachment 41321

That makes a lot more sense than what I did, thanks!

 

[Xylferion]

thx one also plzView attachment 41320

Check your inbox.

 

[a_wiserME!!]

thx one also plzView attachment 41320

do u kno d method of splitting d middle term n factorising?? it has d same concept here..

 

[a_wiserME!!]

ok best of luck everyone for ur exam 2mrw...Insha Allah will pray dt everyone here does it well n plz do remeber me in ur duas too
The ppr will Insha Allah b easy.... just do ur best and leave the rest to Allah...He will not disappoint u
MATH PAPER 22!!! HERE WE COME!!

 

[Thought blocker]

All the very best guys, Faad key rakh dena CIE walo ko, uski to aisy ki taisy

 

[mohabxD]

0580/21/O/N/09 question 14

I keep on getting the wrong answer... help?