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SOMEBODY!!! PLEASE!!! I WONT BUG U ANYMORE!! last queston LITERALLY lolz.

Ive solved all 40+ questions of my maths project, ONE LEFT, which I cannot do. Plz help There is a triangle ABC, right angled. with the right angle at B. Extending AB to point D, and reflecting AC on AB, then extending it to point E due east of D, two similar triangles are formed. Angle ABC and...

Mass of magnesium is 32.63-32.14=0.49g, mass of oxygen=32.95-32.63=0.32g. So how many moles do you have? Divide mass by the atomic weight of magnesium (24.3), and you get 0.0201. Divide g of oxygen by atomic weight (16.0), and you get a mole number of 0.0200. Divide by the small quantity to...

C2H5CH3C8H18 LOL idk haha.

But, if they specified in the question show THIS is (One of the equations) of PQ, does that mean we have to specifically derive that one? Or is it okay if I have manually done one? anyway how does this "Alternative" way work?

Oh cos in a question I found, "Point R(x,y) divides P(x1,y1) and Q(x2,y2) into ratio k:l. Show k/l=(y-y1)/(y2-y)." So I got that bit, then it says, "Hence show equation of the line PQ is (x-x1)(y-y2)=(y-y1)(x-x2)" I ignored hence cos I thought it was unnecessary if you already have PQ, but...

Oh and a random question, when R splits up interval PQ into the ratio k:l, does k/l have anything to do with the equation of PQ?

yea a, b and c are angles of triangle.

Then there's one which I posted before and noone helped me, am unsure if I approach it correctly, "if tan(a)/2=tan(b)/3=tan(c)/4=k, show k=sqrt(6)/4" I did bunch of algebraic manipulation, is that right way to go>

Ahhh thanks so much man! I appreciate it so much :)

Someone please help here, "Let S=(a,b,c,d,e,f,g,h,i,j) be the set consisting of the first ten letters of the alphabet." i)How many subsets of S contain at least three letters? ii) How many subsets with at least three letters do not contain any vowels? iii) How many subsets with at least three...

idk bout relationships-themed but this page has some cool poems http://hayabusaboston.weebly.com/poetry.html

Completely against english in yr 12, it is potentially ruining the future's of very bright children, who just lack a proficiency in english, and because of this their ATAR is pulled down and they cant get into University courses. The smart thing to do would be to accelerate the HSC course in...

Oh yay! thanks :D Next bit confusing though, if (tana)/2=(tanb/3)=(tanc/4)=k, show k=(sqrt6)/4, then hence find the size of angle a in degrees and minutes. Hmm so sorry if im inconveniencing you guys!

Not quite sure what you mean here. Erm, basically its a scalene triangle within another scalene triangle, such that the smaller one is similar to the larger one. The similarity is easily proven by the two sets of corresponding angles, though I have to prove that the two lines that cross the...

TImske could you by any chance help me do Q16 from my original post? Or if you're busy, a quick outline perhaps please? Like, idk how to apply compound angle formula to three angles LOL

Oh yea good point.

Woah thats nice and quick Timske, I went thru a whole polynomial division thing LOL thanks for the quicker method! :D

Yea u got one result lolz. Then there's (1/2)<=(x)<=(3)

I fouund my mistake. its all good.