Mathematics: Post your doubts here!

[MERIHAN]

you know that the sum of a interior angles of polygon is (n-2)*180
since the ratio of 150 angles to 170 angle is same we can be sure that if we multiply n/2 by their sum we will get the sum of internal angles

180(n-2) = (n/2)*(150+170)
180n-360 = 75n+85n
20n=360
n=18

thank you sooo much !!!! may ALLAH GIVE YOU LOTS OF REWARD (AMEEN) AND INSHALLAH YOU WILL PASS YOUR EXAMS WITH TOP GRADES(AMEEN)

 

[bluefa1con]

thank you sooo much !!!! may ALLAH GIVE YOU LOTS OF REWARD (AMEEN) AND INSHALLAH YOU WILL PASS YOUR EXAMS WITH TOP GRADES(AMEEN)

sumeameen and you are welcome
thanks for the prayers
i hope i get to achieve world ranking and you too pass with amazing grades insAllah

 

[Zeerik]

Hey...anyone having there Exam Tomorrow!???

 

[Razo513]

can someone plz help me out in this

 

[Razo513]

who knows how to find the determinant of a matrix off a casio fx-991ES PLUS calculator ??!!

 

[MERIHAN]

sumeameen and you are welcome
thanks for the prayers
i hope i get to achieve world ranking and you too pass with amazing grades insAllah

AMEEN !!!! INSHALLAH ALLAH WILL SURELY HELP US

 

[bluefa1con]

who knows how to find the determinant of a matrix off a casio fx-991ES PLUS calculator ??!!

matrix are piss easy you dont need a calculator to do it
and about the question you posted
and again have a look at my signature

 

[MERIHAN]

ANYONE HERE CAN HELP ME IN SHADING VENN DIAGRAM !!! I JUST WANT GENERAL EXPLANATION AS I AM GETTING MOST OF THE ANSWERS WRONG PLZZZZZ HELP ME

 

[bluefa1con]

ANYONE HERE CAN HELP ME IN SHADING VENN DIAGRAM !!! I JUST WANT GENERAL EXPLANATION AS I AM GETTING MOST OF THE ANSWERS WRONG PLZZZZZ HELP ME

 

[Razo513]

matrix are piss easy you dont need a calculator to do it
and about the question you posted
and again have a look at my signature

thx , my point is i have the tendency to make mistakes easily even when i focus idk why:S that's why i want something to help me check my answers to cut time from the exam to focus of harder questions

 

[ayeshaddy]

add me to the list too

Sure =) I'll remember all of ur names in sha ALlah!

 

[anooshraja]

capacity is another word for volume, you also use logic
ques 12 of what year?

i dont know ho to do same year and paper

 

[Hamzeh S]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_41.pdf

questions 7 part c) I) please

 

[MERIHAN]

JAZAKKULAH HU KHAIR I HOPE I WILL BE ABLE TO DO THE QUESTIONS CRCT

 

[anooshraja]

i dont have summer 11 paper printed so i ll explain
since the base is same take the powers
p-5=1/2
p=5.5

question 5
24* 3600(seconds in 1 hour)=86400

i dont have summer 11 paper printed so i ll explain
since the base is same take the powers
p-5=1/2
p=5.5

question 5
24* 3600(seconds in 1 hour)=86400
part b is just standard form so 8.64 *10power4
second part can u tell me more briefly this picture

part b is just standard form so 8.64 *10power4

 

[anooshraja]

Will definitely be appreciated... A LOT!

question 1 part b is another on xtremes paper thank you

 

[bluefa1con]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_41.pdf

questions 7 part c) I) please

if you extend all 3 lines you get an equilateral triangle
so all three angles out side the figure will be 60( the angle from tangents)
180-60 to get the answer 120

 

[bluefa1con]

thx , my point is i have the tendency to make mistakes easily even when i focus idk why:S that's why i want something to help me check my answers to cut time from the exam to focus of harder questions

i never understood the matrix function on the calculator so maybe someone else can help

 

[anooshraja]

Q1:
a) 06 41
b) Total profit = difference/cost price * 100
= 0.24/2.62 * 100
= 9.16 %

Q2:
Absolute error of the number of bicycles = 1000000/2 = 500000
Upper bound of number of bicycles = 9000000 + 500000 = 9500000
Absolute error of distance traveled by 1 bicycle in one day = 0.1/2 = 0.05
Upper bound of of distance traveled by 1 bicycle in one day = 6.5 + 0.05 = 6.55

Upper bound of the total distance traveled by all the bicycles in one day = 9500000 * 6.55 = 62225000 km

Q3:
a) £1 = $1.96
£25000 = $49000
Later:
$1 = £(1/1.75)
$49000 = £[(1/1.75)* 49000]
$49000 = £28000

Profit = difference/initial cash * 100 = (28000-25000)/25000 * 100 = 12 %

Q4:

a) V of statue/V of model = (H of Statue/H of model)^3
(5*100*100*100)/Vm = (2*100/4)^3
Simplify:
Vm = (5000000)/(125000)
Vm = 40 cm^3
b)
40 cm^3 = ? m^3
1 cm^3 = (1/1000000) m^3
40 cm^3 = [(1/1000000)*40] m^3
40 cm^3 = 4*10^-5 m^3

Q5:
a)
Vs/Vl = (Ls/Ll)^3
(Vs/Vl)^(1/3) = Ls/Ll
Convert litres to cubic cm
(125/64000)^(1/3) = Ls/Ll
(5/40) = Ls/Ll

Ls:Ll = 5:40
Ls:Ll = 1 : 8
b)
(Vl/Vs)^(1/3) = (Al/As)^(1/2)
(6.4/0.0125)^(1/3) = (Al/0.0175)^(1/2) {notice that i changes the cm^2 to m^2}
Simplify:
Al = 1.12 m^2

question 1 patb b is not correct on xtremespaper

 

[MERIHAN]

NEED HELP IN THIS QUESTION