Maths, Addmaths and Statistics: Post your doubts here!

[Mayedah]

20x+50 =12x+60
t=x+5

Thanks alot but i solved the question simultaneously and got the right answer

 

[Enferno]

more detail..
you know that total weight of leaves = 1000g (1kg)
Grade A leaves used will be 450g as given
Grade B leaves used will be 1000-450=550g

just rationalise them now...
450:550 (divide them by 10)
45:55 (divide them by 5)
9:11
TA DA!!

I got the answer myself
But by the way thanks

 

[ashiqbal]

Thanks alot but i solved the question simultaneously and got the right answer

K!

 

[Spidey21]

I got the answer myself
But by the way thanks

np mate..

 

[screamingskull]

This is a june '89 paper's question

AB=[8 -6] (it's a column vector) and CD=3/2 AB

a) Calculate |AB|
b) Express CD as a column vector
c) Given that A is the point (6,9) find the coordinates of the point B.

Kindly help me in part 'c'

 

[multixamza01]

This is a june '89 paper's question

AB=[8 -6] (it's a column vector) and CD=3/2 AB

a) Calculate |AB|
b) Express CD as a column vector
c) Given that A is the point (6,9) find the coordinates of the point B.

Kindly help me in part 'c'

B = AB - A = (8,-6)- (6,9) = (2 , -15)

 

[screamingskull]

B = AB - A = (8,-6)- (6,9) = (2 , -15)

[8 -6] is a column vector AB not the coordinates while (6,9) are coordinates of A so i dont think we can solve it in this way!! :O

 

[multixamza01]

[8 -6] is a column vector AB not the coordinates while (6,9) are coordinates of A so i dont think we can solve it in this way!! :O

but to find the coordinates of AB we'll need a point from where AB is (8 -6) . And we don't have one . I solved it by taking (0,0) as the point !

 

[screamingskull]

The answer to this question was (14,3)

 

[Spidey21]

This is a june '89 paper's question

AB=[8 -6] (it's a column vector) and CD=3/2 AB

a) Calculate |AB|
b) Express CD as a column vector
c) Given that A is the point (6,9) find the coordinates of the point B.

Kindly help me in part 'c'

AB = B - A..you know that right?
B = AB + A...
thats my guess...

 

[Mayedah]

This is a june '89 paper's question

AB=[8 -6] (it's a column vector) and CD=3/2 AB

a) Calculate |AB|
b) Express CD as a column vector
c) Given that A is the point (6,9) find the coordinates of the point B.

Kindly help me in part 'c'

I have done this question...
The coordinates of point A are given(6,9) .now the column vector for AB is given so from point A move 8units towards right of x axis and then 6 units downwards because this was column vector for AB. Now u will land on point (14,3) which are coordinates of B. U can also try this on graph paper .

 

[Mayedah]

This is a june '89 paper's question

AB=[8 -6] (it's a column vector) and CD=3/2 AB

a) Calculate |AB|
b) Express CD as a column vector
c) Given that A is the point (6,9) find the coordinates of the point B.

Kindly help me in part 'c'

I had done this question a while before .Now i attempted it again But i dnt get the second part .I got the answer of CD (12,-9)but The answer to express CD as a column vector is (12,9)at the back of the book in the answers of the unit ..how come its 9 not -9 ?

 

[screamingskull]

Well I think that it is -9, there is no logic for it being positive 9

 

[screamingskull]

AB = B - A..you know that right?
B = AB + A...
thats my guess...

Thanks @spidey21 for the equation but i gave this a little thinking myself and was able to get the answer

 

[Tharindu]

Whats the difference of being absent for an exam and getting a U for that exam subject

 

[multixamza01]

Whats the difference of being absent for an exam and getting a U for that exam subject

Absent means you get an ''X'' instead of your grade on your provincial result document .
Getting a U means you will have a ''U'' smiling on your provincial result document.

both cases result in the space for your grade being left blank on your ''Certificate Of Results'' for that subject .

 

[Tharindu]

Absent means you get an ''X'' instead of your grade on your provincial result document .
Getting a U means you will have a ''U'' smiling on your provincial result document.

both cases result in the space for your grade being left blank on your ''Certificate Of Results'' for that subject .

So wots better...getting u or x

 

[multixamza01]

So wots better...getting u or x

Whatever you get, you'll have to give the paper again. So you would've wasted Rs.6100 registering for the paper .
Getting A* is better

 

[Tharindu]

Whatever you get, you'll have to give the paper again. So you would've wasted Rs.6100 registering for the paper .
Getting A* is better

What comes in the certificate...I suck in second language....tats all...I'm good at others...i want dont want to see a U in my certificate....wot should I do? Sit or get absent....what will appear on my certificates tats all I'm bothered

 

[multixamza01]

What comes in the certificate...I suck in second language....tats all...I'm good at others...i want dont want to see a U in my certificate....wot should I do? Sit or get absent....what will appear on my certificates tats all I'm bothered

on certificate , space is left blank ! so you will have no result .
appear and pray to Allah , he will help you