Mathematics: Post your doubts here!

[Awesome12]

View attachment 36818View attachment 36818

add up all the areas u will get 156

 

[Awesome12]

than a lot u helped me alot

my pleasure

 

[***amd***]

View attachment 36831

Same description goes for the other...

 

[***amd***]

View attachment 36831

another possibility...

 

[Awesome12]

View attachment 36837

substitute values for d that are prime numbers
for example
lets substitute d=2
the equation will become
x^2 - 6x + 2 = 0
now u cant factorize it (even if it possible then u will get fractions, that are not integers)

the next prime number is 3
x^2 -6x + 3=0
again u cant factorize it

the next prime number is 5
x^2 - 6x +5 = 0
u CAN factorize it
u will get
(x-5)(x-1)
so d=5

another easy way to get a prime no. (which we know has a factor of itself and 1) that when added to 1 will give us 6 (u can derive this rule from factorization)
so 5 +1 = 6

 

[Awesome12]

View attachment 36839
my answer is 1/10(2 1) (-4 3) in mark scheme the answer is different

det (A) = 10

the inverse is found as such

 

[Awesome12]

View attachment 36851

take each of the vertices of the triangle, substitute them and then solve them
like this
the answers are in blue

 

[Awesome12]

bro u r a life saver Really Jazak Allah Khair for all that help will always remeber u in my prayers

np
thnx alot bro

 

[***amd***]

sorry dude just one more
6.a. Solve the inequality -7≤2-3x<23
B)Write all the integer values that satisfy the above inequality

i wont solve the whole of it for you... just get a clue,
break the inequality into 2 inequalities.
-7 < 2-3x and 2-3x < 23
now try solving it yourself

 

[Awesome12]

Maths paper 4 very difficult questionns! Please help annyone? View attachment 36892View attachment 36888View attachment 36889View attachment 36890View attachment 36891View attachment 36892View attachment 36888 View attachment 36892

how exactly can we help u, because u have posted a hell lot of questions

 

[Dubi Pro]

this one

 

[Awesome12]

this one

i think u posted one like this and then deleted it
but i had solved it and here is the answer

 

[Dubi Pro]

i think u posted one like this and then deleted it
but i had solved it and here is the answer

View attachment 36942

thanks but angle c can also be written as half of 100 that is angle b

1/2 x 100 = 50

am i right?

 

[Usman Abdul Jabbar]

Hi guys may anyone solve this and please explain to me how to complete this.

 

[***amd***]

Hi guys may anyone solve this and please explain to me how to complete this.
View attachment 36967

which Qs actually you are asking bro?

 

[princess sofia]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w05_qp_4.pdf
Q8 part a (ii)
Q7 , part c (ii)
cn any 1 plz explain me thx cnt get it
thnx in advance

 

[***amd***]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w05_qp_4.pdf
Q8 part a (ii)
Q7 , part c (ii)
cn any 1 plz explain me thx cnt get it
thnx in advance

Q7 c ii
the volume of 14 cm long part of pipe = pie * 0.125^2 * 0.14 = 0.00687 cubic meters.
that means 0.00687 m^3 of water pass through this in a second.
vol. of pool = 1512 m^3
time taken to to empty the pool = volume/rate = 1512/0.00687 = 220087 seconds.

now we need to convert seconds into hrs. so
22o087 sec = 220087/60 min = 220087/3600 hrs = 61 hrs

and 61 hrs = 2 days and 13 hrs

Q8 a ii
new cost of each book = $(x+2)
no. of book bought in $40 = 40/(x+2)
no of books bought for $(x+2) per book in a total of $40 is '1' less than the no. of books bought for $x per book in a total of $40
that means 40/(x+2) - 1 = (40/x)
simplify it and u'll get the eq .
got it?

 

[princess sofia]

Q7 c ii
the volume of 14 cm long part of pipe = pie * 0.125^2 * 0.14 = 0.00687 cubic meters.
that means 0.00687 m^3 of water pass through this in a second.
vol. of pool = 1512 m^3
time taken to to empty the pool = volume/rate = 1512/0.00687 = 220087 seconds.

now we need to convert seconds into hrs. so
22o087 sec = 220087/60 min = 220087/3600 hrs = 61 hrs

and 61 hrs = 2 days and 13 hrs

Q8 a ii
new cost of each book = $(x+2)
no. of book bought in $40 = 40/(x+2)
no of books bought for $(x+2) per book in a total of $40 is '1' less than the no. of books bought for $x per book in a total of $40
that means 40/(x+2) - 1 = (40/x)
simplify it and u'll get the eq .
got it?

yeah thnx

 

[Usman Abdul Jabbar]

Look above for my question still yet no answered

 

[muraqba]

how to find the nth term in squence s
and also about the formula