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There are a few ways to do this. The way I would do it is as follows. If this doesn't make sense, I'll try again: 1. Find stationary points on the graph (either by sight or by differentiating if you have the equation). These points are where dy/dx=0 so they are the x intercepts of the graph. 2...

Sounds good. I've got to go now but if you post some interesting problems I'll have a go when I get back :)

In this case yes because the definition of a square includes all sides being equal.

No worries. If you need any other help, you can PM me :)

I don't totally get your question. A negative in front of a fraction makes the fraction negative. This means that either the numerator is negative or the denominator is negative but not both : -(4/5)=(-4)/5=4/(-5) but DOES NOT equal (-4)/(-5) Does that make sense?

Okay. What I'm guessing they mean is this: Q. 3p -(2/5) -2p -(1/4) =3 p=3+0.4+0.25 p=3.65 The problem with this is that the answer is 10x bigger (probably typo) and the question requires -1/4 instead of +1/4 in your original question.

Do you mean (3p-2)/5-(2p+1)/4=3? If so, multiply both sides by 20 to eliminate the fractions: 4(3p-2)-5(2p+1)=60 12p-8-10p-5=60 2p=73 p=73/2

Who knows, maybe you can revolutionise your grade and get them to pick their game up...

I don't know that much about the strength of the '13 cohort. There are a few beasts at the top but I reckon our year is better than theirs...

Tech this year had a pretty good year. I think our year though (2012) is probably even better (at the top anyway). Our maths cohort is pretty crazy...

Negotiating the cost of a t.v $300 generally isn't that hard given the current climate (did it myself about 7 months ago). Having said that, if you have to pay someone, maybe 25% of the discount they get, so the better they do, the better for them.

Possibly as aligning refers to changing marks based on predetermined standards (e.g. it is possible for everyone to get 90 as a HSC mark in 2U maths) but scaling changes marks based on the relative strength of the cohort doing that subject (to determine a rank for everyone). Having said that...

Did it. How many people are you trying to get? (I might be able to get friends to do it if you need it :))

I've had a few people message me so I uploaded the ones I have here: http://www.mediafire.com/?tsniqyqtubbsl8e Most have solutions but some years don't. Also, there are only about 5 or 6 3U papers (I couldn't find the missing years on a quick search) Anyway, enjoy :)

PM your email and I'll send you a stack of 3 and 4 Unit papers :)

Hey guys, On the BOS website, it says that there were two correct answers for Q8 of the bio paper (LINK HERE) Does anyone remember what the question was and the options? Cheers

You can't predict ATAR's by HSC results as a 90 is physics is way better than a 90 in dance but ATAR calculators take into account scaling of various subjects. They aren't perfectly accurate but are generally pretty close (to within 0.5 ATAR points)

Quite a few people at my school (Syd Tech) do that but the IPT was accelerated, so I'm not sure if that counts.

Our school is quite competitive (Sydney Tech), but the main reason is that the test was stupidly easy so a few dumb mistakes kills you. Hopefully I can make it back though...

Maths Ext. 1- 46/50 (=4/144) Economics- 29/30 (=3/90) Physics- 27/30 (~25/110)