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English and Maths

Hello Got another set of questions and this question is really bugging me. An amicable pair (x,y) is where the proper divisiors (divisors excluding itself) of y sum up to x, and the proper divisors of x sum up to y. Given that p=3*2^(n)-1 and q=3*2^(n-1)-1 and r=9*2^(2n-1)-1 are ALL prime...

Marks don't really help much, different schools have different exams. I'm assuming you go to SG or NSG, and with those ranks, I think it'll be pretty likely for you to get an ATAR. Just study hard and I have no doubts 99 will be possible.

If you're ready to work hard, I strongly suggest it. If you're just wanting it to boost your ATAR, and not anything else, then I strongly suggest you don't pick it up. Hard work always pays off, especially in 4u. You'll need to study from the beginning of the year. 4u isn't as hard as people...

Lol what the heck? Compulsory Ext 1 English? I hope it's not compulsory for Year 12. I wouldn't be able to survive. I'm pretty sure you use Cambridge for maths, for the rest, ask your teachers.

Lol, Sy using some complex stuff here. The idea of the problem was to use elementary geometry.

x=20. This is a well known problem, and has been described as the hardest easy geometry problem.

1. Calculate some known angles: ACB = 180-(10+70)-(60+20) = 20° AEB = 180-70-(60+20) = 30° 2. Draw a line from point D parallel to AB, labeling the intersection with BC as a new point F and conclude: DCF ACB CFD = CBA = 60+20 = 80° DFB = 180-80 = 100° CDF = CAB = 70+10 = 80° ADF = 180-80 =...

Yeah, I guess so. Thanks everyone.

mmh, That also works. How did you get there?

I'm pretty sure NSG uses Cambridge for maths.

Re: HSC 2013 4U Marathon Sy, to edit the title, press edit, and then go advanced.

Ah, exactly what I did but then I divided everything by 52 and didn't know that 91/52 was x/y. Thank you very much!

Tried it on the calculator and it was right. Any clue on how you got there?

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Hello. I received this maths problem and I don't understand how to solve it. I did all this equation stuff but it didn't really help. It's the only one out of all the questions which I'm stuck on so help would be appreciated. Anne asked John to buy a certain amount of feet and ribbon at a...

^ there you go. A tutor answering your question.

Chemistry. Physics is more about knowing content and doing calculations than writing long responses.

His biology probably won't count for his best 10 units because of Society and Culture.