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is cognito tuition good for maths extension 1 and 2 tutoring? if not, are there any you would recommend?

any tips on how to study for my music 2 prelim exam? it's a short exam with a couple listening tasks, a melodic dictation and one sight singing. should I just keep doing hsc past papers? and also how to get better at melodic dictation cos I just don't think im good at it

thank you so muchhhh

could someone please explain to me why the answer is b? i thought you would find the proability that it would be the same and subtract from 1, so 1-(13/52 x 12/51 x 4) = 13/17

is there always going to be a question on aboriginal & torres strait islander detoxification in the prelim exam? if so, how in depth will it be?

the answer is r=100-130t but im not sure how to get to that (part a)