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Well, use geometric argument and just write the equation of the circle with restrictions. That's prob too much for a 2 marker but just to be safe.

Yep, but exclude (-1,0), (0,1)

At the OP: as much as you can cover

I think geometric way is the best way.

I'd be very careful and not say that. Water can both be oxidised and reduced in an electrolytic cell. Yet, it doesn't have a +/- "valency." It's just a dipole. So you must mention molecules as well. I wouldn't say "valency" too... It's dodgy. Charge would be better.

Well I'd guess it varies slightly depending on the battery but ammonium chloride is the main component. You can mention a few other aqueous components in an exam if you want but ammonium chloride (26%w/w if I correctly remember from Jacaranda - and yes, I memorised it for the HSC LOL) should...

LOL actually, for those batteries (which were exactly the ones I used for HSC Chem), Jacaranda Chemistry seemed the most reliable (I figured it out by comparing to various internet sources, etc).

Yeah I saw it just now. LOL... Prob all those humanities/arts people did bad in general while the gap between good and bad marks increased (around the band 6 region).

LOL I thought we did well but school rank actually dropped. Prob there were more of both academically 'good' people and 'bad' people.

Trust Jacaranda for this one.

For Usyd combined med, the only assumed knowledge is that of the degree that medicine is combined with. I.e. If I do advanced science-medicine (which I will), MX1 or 2u maths is assumed due to the adv sci degree. They don't care what level of English applicants did for the HSC. And the...

Yeah but it's a hassle lol. 3u maths allows easier method.

Let P(x,y) be a point on the required circle. AP_l_BP from circle geometry - if you do 3u maths (angle in a semicircle=90 degrees) m(AP) x m(BP) =-1 (y+5/x-2)(y-3/x+4)=-1 y^2+2y-15=-(x^2+2x-8) x^2+2x+y^2+2y-23=0

I don't know about other courses, but for UNSW med, Chemistry is recommended. (and English Standard is assumed)

Just because their arguments are equal, it doesn't mean that modulus of the expressions inside the brackets are also equal.

2 -->Doing ESL does not prevent a person from doing med. 4--> Usyd requires 99.95 (combined med entry)

Ah, okay. Didn't know about it. But still, I assume 100.5 should be competitive enough? I can't be sure though.

Need to even ask? lol 94.5+6=100.5>99.95