VCE General & Further Maths Question Thread!

[BLACKCATT]

Could someone please help with 2c? Is it the 8th or 7th year?
Help much appreciated~

[robo_1337]

I had during 1996, as the result for the start of 1997 was 22106.81

[Cort]

I had during 1996, as the result for the start of 1997 was 22106.81

Out of curiousity, is it actually acceptable to say that?

[lala1911]

Its only a 1 marker, no explanation is required, just year 1997.

[jimmy22]

Hi,
To express: "For every eight x, there at least ten y" as an inequality,
would it be:

8x >(or equal to) 10y  ?

i showed my teacher this, and she seems to think that it is 8x < (or equal to) 10y.

Thanks

[tum1106]

Hey guys I've got a question!

I want to know how do you guys go over your mistakes and make sure you don't make the same ones again? (Silly question I know). I've been doing a number of practice exams and I find that it's always bearings and contour maps (trig) are the areas that I need to work on. Do you guys a) keep doing more exams b) look at the textbook  c) do more questions from other resources e.g. Checkpoints, A+ notes and focus on those areas

I've been schooling for 13 years and I still don't know how to study properly....sigh 

[Damoz.G]

Hey guys I've got a question!

I want to know how do you guys go over your mistakes and make sure you don't make the same ones again? (Silly question I know). I've been doing a number of practice exams and I find that it's always bearings and contour maps (trig) are the areas that I need to work on. Do you guys a) keep doing more exams b) look at the textbook  c) do more questions from other resources e.g. Checkpoints, A+ notes and focus on those areas

I've been schooling for 13 years and I still don't know how to study properly....sigh 

Well, I usually look at the solutions (after I've done the exam), and then check how to see the correct way of doing the question. I then repeat it straight away (Without looking at the solutions) and see whether or not I get it correct. If not, I keep repeating this process until its correct.

If you already know your exact weaknesses, then try do some more extra questions specific to just Bearings and Contour Maps. Ask your teacher for some extra worksheets/questions that cover these topics.

[#J.Procrastinator]

Hey guys I've got a question!

I want to know how do you guys go over your mistakes and make sure you don't make the same ones again? (Silly question I know). I've been doing a number of practice exams and I find that it's always bearings and contour maps (trig) are the areas that I need to work on. Do you guys a) keep doing more exams b) look at the textbook  c) do more questions from other resources e.g. Checkpoints, A+ notes and focus on those areas

I've been schooling for 13 years and I still don't know how to study properly....sigh 

Don't worry, you're not alone! What I do, is try to redo the question again by consulting the textbook. If I can't seem to figure it out then I'll check out the solutions and learn from it.

If you struggle with bearings and contour maps then go back to your textbook and focus on those areas, specifically parts of contour maps or bearings that you struggle with. For example, how to calculate the average slope from A to D etc.. Look at the processes and don't skip any steps!

If it's still not absorbing in and you find that you're still making mistakes, cut those questions out and stick them into your further book with the correct solutions marked in red. This way, in the exam you can refer to these examples and make sure that you won't do the same mistakes again.

[BLACKCATT]

When the question does not specify to round to x decimal places, it is appropriate to just round to 4 decimal places?

And for exam 2 questions regarding a discrete amount (eg, people), are we meant to round up/down according to the closest value?

Take for example, 63.2 students = 63 students
                             63.6 students = 64 students

[abcdqdxD]

Can I get some clarification on this question?

I used 2 different methods and got different answers.

Question: A right angle triangular prism has a volume of 160cm^3. A second right angle triangular prism is made with the same width, twice the height and three times the length of the prism shown. Find the volume of the second prism.

Method 1:

0.5*h*w*l=160
hwl=320

new prism: 2h*w*3l=6hwl 
6*hwl=960cm^3     (which is the correct answer)

Method 2:

Original            New
let h=16           h=32
let w=10          w=10
let l = 2            l=6

Original volume=160

New volume = 32*10*6 = 1920cm^3

Why doesn't the 2nd method work?

Cheers

[lala1911]

Can I get some clarification on this question?

I used 2 different methods and got different answers.

Question: A right angle triangular prism has a volume of 160cm^3. A second right angle triangular prism is made with the same width, twice the height and three times the length of the prism shown. Find the volume of the second prism.

Method 1:

0.5*h*w*l=160
hwl=320

new prism: 2h*w*3l=6hwl 
6*hwl=960cm^3     (which is the correct answer)

Method 2:

Original            New
let h=16           h=32
let w=10          w=10
let l = 2            l=6

Original volume=160

New volume = 32*10*6 = 1920cm^3

Why doesn't the 2nd method work?

Cheers

0.5 * 32 * 10 * 6 = 960cm^3

[RKTR]

you also forgot the 0.5 in your method 1

hwl is 320

your new volume is 0.5 x 2h x w x 3l
                               3 x  hwl = 960 cm^3 

6hwl is 1920.. just pointing out..

[abcdqdxD]

Ah yes, silly me. Cheers.

[plato]

Hi,
To express: "For every eight x, there at least ten y" as an inequality,
would it be:

8x >(or equal to) 10y  ?

i showed my teacher this, and she seems to think that it is 8x < (or equal to) 10y.

Thanks

See Linear Graphs Question

[lolipopper]

how do you do Q4 of core for VCAA 2008 EXAM1
http://www.vcaa.vic.edu.au/Documents/exams/mathematics/2008furmath1-w.pdf

i got D. because the IQR = 90-20= 70 and the median = 35. thus median is half of the IQR.