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The Arts & Humanities subjects are more subjective than maths & science, so I suspect much more difficult to achieve a perfect score. My son is also taking Music composition/performance for HSC next year, in the full knowledge that he might not score as well as his other subjects, but this is...

1) A cuboid of length 5 m, breadth 3 m and depth 2 m required 4 tins of paint to give it three coats. How many tins of paint would be needed to give three coats of paint to a cuboid whose dimensions are doubled? Since the surface area of each face (& therefore total surface area of all faces...

Xylem and phloem. This is a link to a website that is not catering to HSC studies but it compares and contrasts xylem and phloem well with respect to structure, elements in the system, location, nature, movement and function. https://www.diffen.com/difference/Phloem_vs_Xylem

Repeating measurements during the same trial will enable reliability of measurements (ie. precision) to be estimated. Repeating measurements in repeated trials will enable reliability of experimental design to be assessed, but doesn’t improve reliability unless the factors that cause...

I don’t know the answer to your question, but do you really need to pay expensive tuition fees to take exam style questions under time constraints? My older two have never gone to a tutoring centre or had tutors for HSC maths exams. They just find past papers or practice papers and attempt them...

Did you depict NYC positively or negatively in your creative writing piece? If it was mostly positive, then consider ‘disappearing like Camelot in the mists of Avalon’ or ‘like Camelot, shrouded once more by the mists of Avalon’.

Any advice I give is only general. Please consult your teacher, careers advisor or a mentor in real life.

It’s not only possible to repeat Yr 12, but also possible to repeat just one subject (usually at TAFE) to get a better ATAR, but once students get Uni offers, they rarely see the point of repeating which is why it’s so uncommon. This is a link to NESA’s explicit details of HSC pathways...

I’ve been trying to remember the details of my eldest‘s study. She did this six years ago. I did buy her a couple of 1metre steel rulers (set up on our flat dinner table), so that the velocity of the objects, before & after the collision, could be calculated from the distances each object...

The first is a subset of the second.

My eldest did Eng Adv, Math Ex 1 & 2, Bio, Chem, Phys & Ec and managed fine, with a reasonable amount of free time (she still attended lots of parties every month). You just have to be organised and be ‘on task’ when doing assignments or studying.

a(x + 2)^2 + b(x + 3)^2 + c(x + 4)^2 = 2x^2 + 8x + 6 Expand LHS: ax^2 + 4ax + 4a + bx^2 + 6bx + 9b + cx^2 + 8cx + 16c = 2x^2 + 8x + 6 Group the coefficients of the same powers of x on LHS: (a+b+c)x^2 + (4a+6b+8c)x + (4a+9b+16c) = 2x^2 + 8x + 6 Match coefficients of the LHS & RHS to form three...

1. Agree with Azure - you may get a codon table to help you determine whether a single nucleotide change results in an amino acid change or not. From the table, they might ask you to interpret what the original amino acid (a.a.) should have been and what a.a. it is replaced with. 2. Also as...

@Greatcreator, my apologies for going off topic in my previous posts. On topic, it is my understanding that the very top students in any subject are generally not scaled down, so if you have mastery over General maths, my guess is that it should be consistent with an ATAR of 95+. This is a link...

I guess it would be quite easy in a top selective school to just let the top classes work on the next year’s curriculum - they wouldn’t need to change the time table, the whole class can be taught at the same level and it wouldn’t affect the other subject lines in the timetable. I’m surprised...

Yes, that is definitely an option. My understanding is that at several selective schools, it‘s fairly standard to sit one or two HSC subjects before Yr 12 and their timetable is organised to cater for it. It makes the workload in Yr 12 lighter. Other schools can also offer it, but the main...

The other possible triangle is with ∠BCA as an obtuse angle. Since for any angle ‘a’ between 0 and 180 degrees, sin a = sin (180-a), the triangle with ∠BCA = 180-60 = 120 deg and ∠CAB = 25 deg, is the other solution. x = 4.1 sin 25 / sin 35 = 3.0

Agree with your advice to write out the cosine rule, expand and move everything to one side, but the squared terms of x cancel out so the equation to solve isn’t a quadratic. The question is ambiguously posed. If ‘x+4’ is the side opposite the angle of 60 degrees, then it can’t be the ‘longest‘...

@jimmysmith560, I think it’s a more complex 3D problem?? Is ‘O‘ the bottom or top of the tower?

I meant just to check that you were correct. If your expanded solution and the bank’s calculation arrive at the same result, then you know every step is correct. In any case, it was a well written solution.