VCE General & Further Maths Question Thread!

[Stick]

In linear programming, when do we use points within the feasible region as opposed to the vertices of the feasible region? I mean, I was stumped when I looked at a question in Checkpoints like that, and especially because I've never come across it.

On the bright side, 1 SAC left for Further (well, practically 2, but my Graphs+Relations SAC will be finished early next week). Then its on to practice exams!

This is really common (it came up last year). Basically, you use points within the feasible region if the vertices don't give integer values and you're dealing with discrete variables. I hated these questions because you have to trial a lot of points, so it's time consuming.

[RKTR]

I got the same answer for question 1. but for question two i think by 0.08 cents, it means $0.0008. Just clarify this part.
Thank you friend.

oops i didnt look at that part carefully

[Yacoubb]

This is really common (it came up last year). Basically, you use points within the feasible region if the vertices don't give integer values and you're dealing with discrete variables. I hated these questions because you have to trial a lot of points, so it's time consuming.

Okay then, thanks! Luckily I've come across it now before my SAC and the exam!

[lala1911]

Is 33 degrees an acceptable alternate of 033 degrees for a bearing?

[ashoni]

Asking a question for a friend of mine

From a point, A, due north of a tower, the angle of elevation to the top of the tower is 45◦.
From a point, B, 100 m on a bearing of 120◦ from A, the angle of elevation is 26◦. Find the
height of the tower.

[RKTR]

Asking a question for a friend of mine

From a point, A, due north of a tower, the angle of elevation to the top of the tower is 45◦.
From a point, B, 100 m on a bearing of 120◦ from A, the angle of elevation is 26◦. Find the
height of the tower.

form a triangle ..the three vertices are A,B and top of tower ..

length of A to top of tower = height/ sin45
length of B to top of tower=height/sin 26
length AB=100m
angle between A to top and AB is 60
let height =x

use cosine rule to solve for x

[Stick]

Is 33 degrees an acceptable alternate of 033 degrees for a bearing?

033 is safer.

[lala1911]

033 is safer.

People from my school have claimed that they were penalised for not including a 0. I don't see the difference between 033 and 33 anyway. 0 is null.

[Stick]

People from my school have claimed that they were penalised for not including a 0. I don't see the difference between 033 and 33 anyway. 0 is null.

A convention of bearings is that they include three digits.

[DetteAmelie]

Okay guys, I'm stuck on this question.
http://oi42.tinypic.com/vq5lhy.jpg

Never mind I've done it.

[plato]

People from my school have claimed that they were penalised for not including a 0. I don't see the difference between 033 and 33 anyway. 0 is null.

The Study Design refers to "three figure bearings". Writing 033 meets this requirement.

[kevinnguyen]

linear programming having trouble with constaints and which inequalite to use ? please help my sac is tomorrow

[Yacoubb]

linear programming having trouble with constaints and which inequalite to use ? please help my sac is tomorrow

if the question tells you 'no more than', this alludes to it being a (less than or equal to) inequality sign.
if the question tells you 'at least', this alludes to it being a (greater than or equal to) inequality sign.
if the question tells you 'more than'or 'less than', you use the normal < or > signs.

Remember that a solid line is used for (greater/less than or equal to), and a broken line is used for < or > inequalities.

[Zealous]

The Study Design refers to "three figure bearings". Writing 033 meets this requirement.

Haha now I'm worried about this a little.

Is writing this enough?



I generally keep all my bearings in true? I hope that's sufficient o.o

[robo_1337]

Haha now I'm worried about this a little.

Is writing this enough?



I generally keep all my bearings in true? I hope that's sufficient o.o

Well how many figures do you have? 2
The study design specifically mentions needing 3 figures
therefore not sufficient
:|