Maths, Addmaths and Statistics: Post your doubts here!

[exploded diper]

https://sites.google.com/site/urbangeekclassroomsg/emath-classroom/number-sequences
this might help, courtesy of flrnab.

someperson

 

[asadalam]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w07_qp_1.pdf
In question 15 , do we have to ensure that the length and the width must equal to 39 since he has a total of 39 fences or we just need to put up some ransom values and then calculate the areas?

Of course we have to keep the total value to 39 fences,but vary their distribution to get the largest area which would be 19 X 10 =190(i dont have super memory about every q i did this one yesterday )

 

[Mahnoorfatima]

Of course we have to keep the total value to 39 fences,but vary their distribution to get the largest area which would be 19 X 10 =190(i dont have super memory about every q i did this one yesterday )

But the answer that I got is much larger. if the width is 31 and length 8, we get 248, why is this wrong?

 

[FirstHippo]

xy = A + 2x
xy -2x = A
x(y-2) = A
x + A/(y-2)

Thank you so much!

 

[Dream.Eater]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w11_qp_12.pdf

how to do 27:b:2

exploded diper
its x = -1 beacause it should be 2 spaces behind A since there's a gap of 2 spaces between A and C....
BTW did you do part b of this sum?? how is it supposed to be done??

 

[FirstHippo]

A/(y-2) ?

Thanks, but I actually wanted step-by-step instructions. Anyways, problem solved. Thanks peaccce and DaniyalK

 

[funky brat]

whole question?

Yeah, Idk this stretch thing.

 

[exploded diper]

exploded diper
its x = -1 beacause it should be 2 spaces behind A since there's a gap of 2 spaces between A and C....
BTW did you do part b of this sum?? how is it supposed to be done??
View attachment 43713

Hope u get it...its a little messy and just. Ignor the ticks....its from where the arrow points

 

[Mahnoorfatima]

exploded diper
its x = -1 beacause it should be 2 spaces behind A since there's a gap of 2 spaces between A and C....
BTW did you do part b of this sum?? how is it supposed to be done??
View attachment 43713

How? How is it -1, I mean kahan -1 Aur kahan a and c. please explain !

 

[asadalam]

But the answer that I got is much larger. if the width is 31 and length 8, we get 248, why is this wrong?

If width is 31 then that would mean that the total perimeter of would be 31+31(2 widths)+ 8=70 fences whereas total fences are 39,

You are not focusing clearly,the width is on both sides and we have to take that into consideration.If it is 10 it would be total perimeter of 10+10+19=39 which is largest possible area.Getting me?

 

[funky brat]

http://papers.xtremepapers.com/CIE/...(Calculator Version) (4024)/4024_w05_qp_1.pdf
q22 part a, what is reflection M?

 

[Mahnoorfatima]

If width is 31 then that would mean that the total perimeter of would be 31+31(2 widths)+ 8=70 fences whereas total fences are 39,

You are not focusing clearly,the width is on both sides and we have to take that into consideration.If it is 10 it would be total perimeter of 10+10+19=39 which is largest possible area.Getting me?

Oh yeah, okay, so you mean that the perimeter is giving us the total number of fences, right?

 

[Dream.Eater]

How? How is it -1, I mean kahan -1 Aur kahan a and c. please explain !

its X=-1 since its 2 spaces away from triangle A and 4 spaces away from C since its a shear by x2

 

[***amd***]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w05_qp_1.pdf
q22 part a, what is reflection M?

its reflection in the line y=x-2

 

[Dream.Eater]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w05_qp_1.pdf
q22 part a, what is reflection M?

the reflection is in the line=x-2

 

[funky brat]

its reflection in the line y=x-2

I know this is reflection in y=x-2
Can you do part a?

 

[Dream.Eater]

part b?????

 

[Dream.Eater]

I know this is reflection in y=x-2
Can you do part a?

ans is (6,2)

 

[funky brat]

ans is (6,2)

Yeah but how? :/

 

[asadalam]

Q3.b