IGCSE MATHS Doubts

[Shazizzzle]

According to our teacher, order of rotational symmetry can never be 1.

It's either 0, 2 or 4.
And that image only turned back to it's position after one whole turn,
and...
EVERY IMAGE TURNS BACK TO ITSELF AFTER THE COMPLETE 360 deg,
So, the order or rotational symmetry was 0?

And the sinx-cosx=0.5, what do you suppose can be the range of the answers?

Also, what equation of line did you get in the intersecting lines one, the lat part?

[dsiddiqi11]

According to our teacher, order of rotational symmetry can never be 1.

It's either 0, 2 or 4.
And that image only turned back to it's position after one whole turn,
and...
EVERY IMAGE TURNS BACK TO ITSELF AFTER THE COMPLETE 360 deg,
So, the order or rotational symmetry was 0?

And the sinx-cosx=0.5, what do you suppose can be the range of the answers?

Also, what equation of line did you get in the intersecting lines one, the lat part?

i got y=3x-13, but is this the question u are talking abt

[Shazizzzle]

i got y=3x-13, but is this the question u are talking abt

Umm, I'm referring to variant 2.

One thing, was the gradient of the line parallel to it 3, or -3?

[haris94]

ANSWERS THAT I CAN REMEMBER:
rotational symmetry-1
lines of symmetry -1
rearranging thing x=3/(p-1)
white paint thing = 88
maximum speed of boris - 16.25
sin cos things- 45 degrees and 66 degrees
the very last graph qs - 82 i think and 108
the inequalites R- was in the slightly large area towards the middle/right

P.S. who agrees that the paper was definitely more difficult than past papers but still went super-awesome
I LOOOOVED IT

i got exactly the same answers  

agreed, paper required more thinking but i think i (like Ari said) killed it  

[mohit1234]

i got y=3x-13, but is this the question u are talking abt

i got y=-3x+14

[haris94]

Umm, I'm referring to variant 2.

One thing, was the gradient of the line parallel to it 3, or -3?

the gradient was -3
cause the equation of parallel line was 3x+y=18
so it becomes y=18-3x

the equation finally is
y=-3x+14

[dsiddiqi11]

Umm, I'm referring to variant 2.

One thing, was the gradient of the line parallel to it 3, or -3?

i think its 3, cuz parallel lines have same gradient

[Shazizzzle]

the gradient was -3
cause the equation of parallel line was 3x+y=18
so it becomes y=18-3x

the equation finally is
y=-3x+14

Wow. :/

[Dibss]

Umm, I'm referring to variant 2.
One thing, was the gradient of the line parallel to it 3, or -3?

i did variant2 and grad was -3

i got y=-3x+14

SAME

i got exactly the same answers  
agreed, paper required more thinking but i think i (like Ari said) killed it  

WOOT WOOT

[dsiddiqi11]

guys for the boris speed question, i didnt multiply my answer by 2 to get the max speed, so how many marks do i get, i showed all of the working

[haris94]

guys for the boris speed question, i didnt multiply my answer by 2 to get the max speed, so how many marks do i get, i showed all of the working

y do u hv to multiply the answer by 2 
i dont remember doing that

[Dibss]

guys for the boris speed question, i didnt multiply my answer by 2 to get the max speed, so how many marks do i get, i showed all of the working

um what multiplying by2?
you find alonso's total dist. which was 130
then you do 1/2 x v x 16 = 130
v=16.25

[Choc.Kits]

the gradient was -3
cause the equation of parallel line was 3x+y=18
so it becomes y=18-3x

the equation finally is
y=-3x+14

Did that! Amazzzzzzing!

[Choc.Kits]

And its true, the first question, the rotational symmetry was 0. Cause you cant have a rotational symmetry of 1.

As far as i know, i lost out on the sinx - cosx = 0.5... i messed that sh*t up....

[Shazizzzle]

And I messed the gradient sh*t up.
So... 1 or 2 marks, either way, that's sh*t. :/
Crap.