Maths, Addmaths and Statistics: Post your doubts here!

[scouserlfc]

Hey! I am having a problem solving this question. Please help me out.
5(m-2n)-(m-2n)(m-2n)

Actually can we know what the question is because i cant understand what we have to do in this question

 

[silent_birdee]

U have to factorize it.

 

[silent_birdee]

After the initiative taken by Math_angel in the IGCSE section, I have made this topic for students of O'levels. You can post any question or any problem here and me along with other XPF users will try to help you as soon as possible. This topic is a feasible option as it won't bring a hassle of making new topics for every question and it will also allow the helpers to not miss any of your questions and have one common topic for answering your Mathematics queries.

So start posting your problems.

Hey... Please help me out!
I'm confused because of two questions.
Q: A bus travels at 36km/h and arrives at its destination half an hour late. If it travels at 42km/h, it arrives at the same destination half an hour earlier. Find the journey's distance.
The below question is about simultaneous equation.
Q: If A gives B $3, B will have twice as much as A. If B gives A $5, A will have as much as B. How much does everyone have?

 

[scouserlfc]

Hey... Please help me out!
I'm confused because of two questions.
Q: A bus travels at 36km/h and arrives at its destination half an hour late. If it travels at 42km/h, it arrives at the same destination half an hour earlier. Find the journey's distance.
The below question is about simultaneous equation.
Q: If A gives B $3, B will have twice as much as A. If B gives A $5, A will have as much as B. How much does everyone have?

Q1)
D=D
36(x+0.5) = 42(x-0.5)
36x + 18 = 42x - 21
18+21 = 42x - 36x
39= 6x
x=6.5 hrs

now for finding the distance use any one side of the equation
D= 36(6.5) + 18
D= 234+18
D=252 km !

Will solve Q2 later

 

[silent_birdee]

Q1)
D=D
36(x+0.5) = 42(x-0.5)
36x + 18 = 42x - 21
18+21 = 42x - 36x
39= 6x
x=6.5 hrs

now for finding the distance use any one side of the equation
D= 36(6.5) + 18
D= 234+18
D=252 km !

Will solve Q2 later

Thankx...

 

[Spidey21]

PEOPLE STUDY IN SUMMERS!!

 

[scouserlfc]

PEOPLE STUDY IN SUMMERS!!

If u dont study let other study
BTW u dont have anything to study now do u

 

[Spidey21]

If u dont study let other study
BTW u dont have anything to study now do u

nope...nothing at all!! what about you?
you got something??

 

[scouserlfc]

nope...nothing at all!! what about you?
you got something??

Nopes, it looks as if i have been free for ages

 

[Spidey21]

Nopes, it looks as if i have been free for ages

not like that with me..
for me its like free for nothing..
in these summers..i put an end to my thirst of sleeping!!

 

[silent_birdee]

PEOPLE STUDY IN SUMMERS!!

why... u think they study in winter

 

[scouserlfc]

HAHAHAH !
lets get back to topic its going off topic now

 

[Spidey21]

why... u think they study in winter

in winters you do study cuz that makes sense...you have exams in like 3 months..but in summers...HOW do you study!

 

[silent_birdee]

in winters you do study cuz that makes sense...you have exams in like 3 months..but in summers...HOW do you study!

Just like that we study in winter
i have to study bcz i'm having my assessments after vacations. So its important for me. Don't know abt u?

 

[Spidey21]

Just like that we study in winter
i have to study bcz i'm having my assessments after vacations. So its important for me. Don't know abt u?

i have nothing to study..i ma waiting for A levels to start!!

 

[zainabkhann]

Guys

can u help me in a math past paper problem for matrices, Its from past paper gcse olevels year: 2006,paper 2, question 11,

Look at a ii), i dont get why when we find the determinent, we didnt switch the values of B to
(d -b)
(-c a)

as well as aiii) and aiv)

Il upload the past paper

Please explain properly so i know how to solve​

 

[Spidey21]

Guys

can u help me in a math past paper problem for matrices, Its from past paper gcse olevels year: 2006,paper 2, question 11,​

Look at a ii), i dont get why when we find the determinent, we didnt switch the values of B to​

(d -b)​

(-c a)​

​

as well as aiii) and aiv)​

Il upload the past paper​

​

Please explain properly so i know how to solve​

determinant of A = 7(might be wrong )
you dont switch the values of B cuz you use A to find A-1 and then you solve it as B = A-1

A X C
(1 -3)(X) = (-1 0)
(3 -2) (Y) (0 1)
solve this

well A (iv) is a transformation..so its a 90* A-Clockwise Rotation on the Origin...let me know where i am wrong..its been two months i have not touched Maths!!

 

[zainabkhann]

Going to get back to this question, will let you know soon thanks btw

 

[zainabkhann]

guys i have a question even though its sounds easy, it always give me a hard time, so its about coordinate geometry
from year: 1996 paper 1 question 6
The equation of a straight line l, is 6x-2y+1=0
a). write this equation in the form y=mx+c

I can never re-arrange and make it to that equation above. give me some helpful explanantion too

thanks

 

[faraz shahid]

Hello i m new here and want help in ADDMATHS chapter identities . I literally dont get it!!!!!!