General Thoughts: Mathematics (1 Viewer)

[hul0]

how many correct answers did you get for the two triangle translation - reflection - rotation question??

i think i only put 1 rite =(

 

[silence--]

two cakes with diameter 20cm arranged in the shape of an 8. Circles of diameter of 6 cut out.

answer was 182pi i believe

 

[Cee.]

Totally screwed up in the first section. This is what happens when you depend on a calculator for so long. This exam was so much easier than I thought, didn't do any study.

 

[mirakon]

Was the school cert maths more difficult this year? If they're any difficult questions or ones that you're having trouble with, I'd like to have a look at them.

 

[Mythril]

For the cake question I also got 182 pi. As for the triangle questions where we had to say whether the statements were correct or incorrect, I also only got one that was correct and that was the first one.

 

[hul0]

how many correct answers did you get for the two triangle translation - reflection - rotation question??

i think i only put 1 rite =(

sooooooooooo worried already got like 5 wrong

 

[silence--]

im not sure.

you work it out like this in any case: diameter 20, so radius 10. Area of a circle = pi r^2
so 100pi, then there's two circles, so 200pi. then subtract the area of the two things which are both 9pi.

so 182pi

edit: too slow lol

 

[Mythril]

how many correct answers did you get for the two triangle translation - reflection - rotation question??

i think i only put 1 rite =(

sooooooooooo worried already got like 5 wrong

Yup, only one out of the four listed were right but I got the first one listed which was a reflection and then a rotation (I think) as correct.

 

[Matt 20 1]

For The Last Question. The Elipsis is wrong. Cause if n=2, you won't get the answer by:
1^3+2^3+3^3+4^3... +2^3

I'm not saying I got it right. I wrote something random.

I put:

t = (s *less than/equal to sign* n *greater than sign* 0)^2

You can obviously tell maths isn't my best subject...

 

[hul0]

same as you for the triangle question.


I got 6 wrong so far.

Yup, only one out of the four listed were right but I got the first one listed which was a reflection and then a rotation (I think) as correct.

yayy!!!!
i love it when we all get the same answers
=)

 

[silence--]

For The Last Question. The Elipsis is wrong. Cause if n=2, you won't get the answer by:
1^3+2^3+3^3+4^3... +2^3

I'm not saying I got it right. I wrote something random.

I put:

t = (s *less than/equal to sign* n *greater than sign* 0)^2

You can obviously tell maths isn't my best subject...

the ellipses indicate you continue until you reach whatever number n is. Therefore if n is two you just go up to the two. It's just a general expression. You won't be wrong for writing it like that.

 

[chevlr]

For The Last Question. The Elipsis is wrong. Cause if n=2, you won't get the answer by:
1^3+2^3+3^3+4^3... +2^3

I'm not saying I got it right. I wrote something random.

I put:

t = (s *less than/equal to sign* n *greater than sign* 0)^2

You can obviously tell maths isn't my best subject...

nah, cos with the ellipses you stop at the integer n, you don't add them all up and do n^3 again, so if n=3 it would be 1^3 + 2^3+3^3
i see where ur coming from but thats not how it works
and wat does s stand for in the equation you wrote?

 

[brent012]

thanks, but was (191pi) one of the answers?
cus I don't think there were any decimals in my working out.

Im sure there was 91 which was A. I think that was wrong.

 

[eggy444]

how many correct answers did you get for the two triangle translation - reflection - rotation question??

i think i only put 1 rite =(

sooooooooooo worried already got like 5 wrong

it was like 1 i'm pretty sure

i thought it was reflection and (transition)-forgot what it was called

 

[eggy444]

What a LEGEND!!! No one in my school used that goddamn expression. Thanks for showing the answer to 84C.

well i'll be damned

 

[zxreth]

Man I full stuffed up Non-Calculator. Hardly had enough time and I just couldn't focus. The other part wasn't as bad. I still found it harder than it should have been! Know I won't get the mark I've been aiming for...

same here

 

[Riproot]

Man I full stuffed up Non-Calculator. Hardly had enough time and I just couldn't focus. The other part wasn't as bad. I still found it harder than it should have been! Know I won't get the mark I've been aiming for...

Yeah me too, im so pissed.
but i barely studied and these dont count towards anything, coz we've got HSC so it doesnt matter.

 

[FTW]

rofl I was close to finishing out the Q24. find x question when I realise I had 10 seconds left, so I looked at my working once more, I knew that from the equalateral triangle that it must be less than 60 so I just guessed 45. hehehe, looks like I was right.

Also idk what traslation is, I've never learnt it. I was like wtf???

 

[Hayzazz]

Translation is just moving the triangle.

I didn't know what it was, and I worked it out o__O
I mean seriously, if it wasn't flipping or rotating, what is the ONLY other movement that can be made on the triangle...

 

[hul0]

what was the answer for the rectangular prism being cut through a line and they had 2 diagrams on it .... i guessed it.. AH -(B)

at the time all answers looked right =(