Mathematics: Post your doubts here!

[Shepard97]

They are all math subjects, but it is only allowed to take one of them if you take two or three only one of them will be counted in the eight subjects required

Are you talking about a question ?

 

[swaggers]

i have doubt in 0580/41/m/j/12 in maths past paper question no 6 plz some one can kindly help me fast

 

[VelaneDeBeaute]

i have doubt in 0580/41/m/j/12 in maths past paper question no 6 plz some one can kindly help me fast

POST THE LINK !!

 

[Afzal1]

i have doubt in 0580/41/m/j/12 in maths past paper question no 6 plz some one can kindly help me fast

1) firstly form an equation (2x-1) (4x-7) = 1
2) simplify by removing the brackets.
for the second question use the quadratic formula and calculate the height of the parallelogram

 

[Afzal1]

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

help for 2 b)

 

[ciemathematics]

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

help for 2 b)

As per the question number Q-2 B. For the number of people of families of another n students. As you already know:

mean = summation of observations/ no of observations

As given, the mean of these number of people of families of another n students is 3.
Hence substituting in the formula of mean:

3 = no of people in families of another n students/n

Hence, no of people in families of another n students = 3n

Mean number of all(40 + 3n) students = total number of families/ total number of students
= 190+3n/ 40+n




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ciemathematics.com team.

 

[Afzal1]

Thnx

 

[ciemathematics]

You are always welcome Afzal1.

Do visit us again for any assistance.

 

[sweetiepie]

Q. In How Many Years a sum of Rs 3000 would amount Rs 6130.43 at 6% compounded quarterly ?
Q. Find the amount of Rs 250 invested at the end of each of 5 successive years at 6% interest compounded annually ?

plz help me as soon as possible with all steps

 

[Iridescent]

Q. In How Many Years a sum of Rs 3000 would amount Rs 6130.43 at 6% compounded quarterly ?
Q. Find the amount of Rs 250 invested at the end of each of 5 successive years at 6% interest compounded annually ?

plz help me as soon as possible with all steps

Ans.1. A=P(1+R/100)^T (where A is the final amount, P is the principal amount, R is the rate and T is the time)
6130.43 = 3000(1.06)^T
6130.43/3000 = 1.06^T
(6130.43/3000)^1/12 = 1.06
T=12
as the interest is compounded quarterly, 12/4 = 3 years

Ans.2. A = 250(1.06)^5
=Rs.334.6

 

[sweetiepie]

Ans.1. A=P(1+R/100)^T (where A is the final amount, P is the principal amount, R is the rate and T is the time)
6130.43 = 3000(1.06)^T
6130.43/3000 = 1.06^T
(6130.43/3000)^1/12 = 1.06
T=12
as the interest is compounded quarterly, 12/4 = 3 years

Ans.2. A = 250(1.06)^5
=Rs.334.6

thank you

My Next Questions

Q. If two linear equations in two unknowns have no common solution, these equations are called ?
A. Consistent B. Inconsistent C.Identical D. Independent

Q. Solve x- 12x + 36 = 0
By Factorization Method
By Quadratic Formula

Q. The Sum Of three Consecutive intergers is 54. What are the intergers?

 

[Afzal1]

thank you

My Next Questions

Q. If two linear equations in two unknowns have no common solution, these equations are called ?
A. Consistent B. Inconsistent C.Identical D. Independent

Q. Solve x- 12x + 36 = 0
By Factorization Method
By Quadratic Formula

Q. The Sum Of three Consecutive intergers is 54. What are the intergers?

1)the factorisation method is simple
take the middle value of (x) as the sum (-12)
multiply the first value of (x2) with the last no. (36)
thus we get the sum as -12 and the product as 36
now find two no.s which when added hav a sum of -12 and a product of 36
they are -6, -6 and since the coefficient of (x2) so we can directly write it as (x-6) (x-6)

 

[Afzal1]

2) let the first no. be (x) so the next two consective no.s are x+1 and x+2
s0 x+x+1+x+2=54
so x=3

 

[Iridescent]

2) let the first no. be (x) so the next two consective no.s are x+1 and x+2
s0 x+x+1+x+2=54
so x=3

x+x+1+x+2=54
so x=17
the integers are 17, 18 and 19
sweetiepie
the quadratic formula for ax^2+bx+c=0 is[1]s

​

For ax2 + bx + c = 0, the value of x is give
so -(-12)+-root(12)^2(-4*1*36)/2*1
12+-root(144-144)/2
12+-root(0)/2
12/2=6
so x=6

 

[Iridescent]

thank you

My Next Questions

Q. If two linear equations in two unknowns have no common solution, these equations are called ?
A. Consistent B. Inconsistent C.Identical D. Independent

Q. Solve x- 12x + 36 = 0
By Factorization Method
By Quadratic Formula

Q. The Sum Of three Consecutive intergers is 54. What are the intergers?

for the first question, i think inconsistent

source:
http://www.google.com/url?sa=t&rct=j&q=independent equations&source=web&cd=2&cad=rja&ved=0CDYQFjAB&url=http://en.wikipedia.org/wiki/System_of_linear_equations&ei=zATXUNK5D8uS0QWx8ICwAg&usg=AFQjCNGA-88TP0T5tyKqCkIlcGH_k1uSOA

 

[gadagada]

Please help me with this question.
Oct/Nov 2008 Paper 4 Question 10

Thank you

 

[Afzal1]

10ai) 8(8+1)/2 ; 36
ii) 400(400+1)/2 ; 80200
bi) for 1+2+3+4+5+6..................+n=n(n+1)/2
so cross multiply it by 2 so it comes to 2n(n+1)
bii) 200(200+1)/2
biii) so subtract 80200- 40200
c) 2n(2n+1)/2

 

[Nbl_Amd]

Can someone explain me planes of symmetery with diagrams ? ;/

 

[Afzal1]

Can someone explain me planes of symmetery with diagrams ? ;/

lgfl.skoool.co.uk/content/keystage3/maths/pc/.../LO_Template.swf

 

[stubborn angel]

can any1 tellme the way to get standard form frm calculatr...!!