Maths D 22

[Saad Mughal]

wat was the answer to the speed at the end of that question....i placed the value of x in the eqn 1800/x. Is it okay?

Yes.

 

[Neon light]

No

they might cut 1 mark, as the bearing was two digits. Therefore, we need to give a zero at the start....

 

[Danish Alvi]

What was the answer to EG:GB question ? Was it 23:41 ?

 

[Neon light]

What was the answer to EG:GB question ? Was it 23:41 ?

yes....

 

[Kamihus]

they might cut 1 mark, as the bearing was two digits. Therefore, we need to give a zero at the start....

it was 31.2
If seen this before in Mark Schemes and they always have 0 in brackets which indicates it isn't necessary whether two digits or not

 

[Danish Alvi]

What was the answer to the post manufacturer one...was it $27 ? (Manufacturing cost) ? Plus could the length of the post be more than 8m ? I tried with upper bounds but answer was like 7.955m but still less than 8

 

[Danish Alvi]

Acha what was the centre of enlargment of the parrelelogram enlargment ? I wrote it was an enargment with scale factor 3 and centre as origin

 

[Muqeet Tahir Malik]

No -4 + underroot of 136, I guess 1 mark will be list if I am wrong because only signs changed

 

[Kamihus]

Acha what was the centre of enlargment of the parrelelogram enlargment ? I wrote it was an enargment with scale factor 3 and centre as origin

B was the center and u r correct for rest

 

[Danish Alvi]

was the number sequence of D = 1/2(n+1)(n+2)

 

[Mohammad Farzanullah]

Yes.

the answer was 230 seconds! Correct?

 

[Heyyy]

PQ = (-9 18).
PS = (-4.5 9)
PR = (3 12)
SR = PR - PS
SR = (3+4.5 12-9) = (7.5 3.0)

I didn't use this method but got the same answer

 

[Saad Mughal]

the answer was 230 seconds! Correct?

Yes correctly rounded off to 3 sig. fig. it was 230 seconds.

 

[Saad Mughal]

I didn't use this method but got the same answer

Obviously. There were multiple ways to do it.

 

[Aly Emran]

Yes correctly rounded off to 3 sig. fig. it was 230 seconds.

Suit i wrote 229.9 cox my answer was exact like this one

 

[Heyyy]

I wrote 035 but in last i wrote 31.2

The first one wasn't bearing,we just had to find the angle.

 

[Saad Mughal]

Suit i wrote 229.9 cox my answer was exact like this one

It wasn't exact for me so I rounded off.

 

[Mohammad Farzanullah]

It wasn't exact for me so I rounded off.

it couldnt have been exact since the value of 7.83 was rounded!

 

[Saifyyy]

No, you can't. In vectors, the origin is O (0,0). Not B. If B was the origin it would have coordinates (0,0). The fact is, they WANTED us to derive this from ABCD and PBQR, which many of us didn't which means we'll lose the one mark.

I hope that you are wrong.. Acha tell me the radius of cylinder in the last question..

 

[Muqeet Tahir Malik]

I got 429.999 speed as I guess I took 7.83 as speed and rounded of to 430 so guys my 1 mark will be only deducted,it was an error but method was same