Maths, Addmaths and Statistics: Post your doubts here!

[Kamihus]

how to write if it is siad to write it correct to 3 significant figures
0.069042

0.0690
zeros after decimal r not significant, and u have to write the zero at the end

 

[AhsanAfzal]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics - Additional (4037)/4037_w05_ms_1.pdf

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics - Additional (4037)/4037_w05_qp_1.pdf

explain Q5 pls

 

[Suchal Riaz]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics - Additional (4037)/4037_w05_ms_1.pdf

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics - Additional (4037)/4037_w05_qp_1.pdf

explain Q5 pls (sorry for troubling you again and again )

 

[AhsanAfzal]

View attachment 24269

thank u very much bro!
but i dont understand y u used (1+3t, 12+2t).

Is this correct?
velocity=dist./t
dist.=(3i+2j)*t
=3t+2t
then position will be =(1,12)+(3t,2t)
=(1+3t,12+2t)

 

[Suchal Riaz]

thank u very much bro!
but i dont understand y u used (1+3t, 12+2t).

Is this correct?
velocity=dist./t
dist.=(3i+2j)*t
=3t+2t
then position will be =(1,12)+(3t,2t)
=(1+3t,12+2t)

yes correct. i think i should have drawn i diagram but i was too lazy
but u got the idea. position at any time t = position at t=0 + velocity(t)

 

[AhsanAfzal]

pls explain 3-(a) ii-

 

[usama321]

as the shaded area = one small circle. So the area of the five small circles pi r^2 + the five shaded region = pi R^2. that becomes 10 pi r^2 = pi R^2. Do the cutting, and the answer would be

R^2: r^2 = 10:1

pls explain 3-(a) ii-

 

[AhsanAfzal]

i dont get it. y is shaded area=one small circle?

 

[AhsanAfzal]

i dont get it. y is shaded area=one small circle?

ohh i got it. didnt read the last line.

 

[lovely rose]

A tin of soup contains 166 calories
This is 8.3% of the recommended daily number of calories
Calculate the recommended daily number of calories

ans plz

 

[Saad Mughal]

A tin of soup contains 166 calories
This is 8.3% of the recommended daily number of calories
Calculate the recommended daily number of calories

ans plz

Let x be recommended calories.
166 = 8.3% * x
166 = 8.3/100 * x
x = 166*100/8.3
x = 2000 calories.

 

[zeekay132]

I cant even solve this Please explain me..

 

[usama321]

I cant even solve this Please explain me..

Ok, we have got x and y in cm and the perimeters in meters. So perimeter one would be 1020cm, and two would 1360 cm

Now, in the first one, it only tells about the outer perimeter. The outer perimeter would be 2(4x + 5y). We can form the equation

2(4x+5y) = 1020
4x + 5y = 510

In the next one, we have to consider the whole perimeter, which includes the outer and the perimeter of the inner slabs too. So the outer one would be 2 (6x+3y). The inner one would 2 (4x+y) Now we can form this equation

w(6x+3y) + 2 (4x+y) = 1360

5x + 2y = 340

 

[zeekay132]

Ok, we have got x and y in cm and the perimeters in meters. So perimeter one would be 1020cm, and two would 1360 cm

Now, in the first one, it only tells about the outer perimeter. The outer perimeter would be 2(4x + 5y). We can form the equation

2(4x+5y) = 1020
4x + 5y = 510

In the next one, we have to consider the whole perimeter, which includes the outer and the perimeter of the inner slabs too. So the outer one would be 2 (6x+3y). The inner one would 2 (4x+y) Now we can form this equation

w(6x+3y) + 2 (4x+y) = 1360

5x + 2y = 340

Thank

 

[TheStallion-Reborn]

http://papers.xtremepapers.com/CIE/...Calculator Version) (4024)/4024_s12_qp_21.pdfquestion 8 part a. help me please!

 

[usama321]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s12_qp_21.pdfquestion 8 part a. help me please!

it simple enough. There would be the alternate angle of 127 and then the rest is 180 See below.180 + 127 = 307

 

[usama321]

well for the next two parts, first convert the lengths into centimeters by dividing them by 10. So AB would be 9 cm. you know the bearing of B from A, so set your protractor, and draw a line of 9cm in that angle. For AC distance is 8.5 cm. Draw another arc of 8.5 cm from A. For BC, distance is 10cm, so draw an arc of 10 cm from B. Where the two arcs meet you have got C. complete the diagram now

For the third part, you have to do it from the diagram. Set down your protractor and measure it. it might be also possible by using some formula, but i don't have the diagram in front of me right now.

 

[TheStallion-Reborn]

well for the next two parts, first convert the lengths into centimeters by dividing them by 10. So AB would be 9 cm. you know the bearing of B from A, so set your protractor, and draw a line of 9cm in that angle. For AC distance is 8.5 cm. Draw another arc of 8.5 cm from A. For BC, distance is 10cm, so draw an arc of 10 cm from B. Where the two arcs meet you have got C. complete the diagram now

For the third part, you have to do it from the diagram. Set down your protractor and measure it. it might be also possible by using some formula, but i don't have the diagram in front of me right now.

oo thnkeewww man. thnkew so much!

 

[sweetiepie]

If TWO LINEAR EQUATIONS IN TWO UNKNOWNS HAVE NO COMMON SOLUTION
THESE EQUATIONS ARE CALLED

CONSISENT
INCONSISENT
IDENTICAL
INDEPENDENT

 

[sweetiepie]

Payments are made at the end of each payment interval for

ordinary
annuity
simple interest
all of these