VCE General & Further Maths Question Thread!

[atarno]

Hey guys!

I've attached a question below which has me absolutely stumped. It's a question from 2016 Insight and I've never come across a trend line where deseasonalised sales are predicted from sales; it doesn't make sense to me.

I've also attached the answer if needed.

Any help would be greatly appreciated!

[SMOKIE]

can someone explain to me about inequalities
i.e " Xavier must work at least twice as many hours as Younnis"  and let x be Xavier and y be Younnis. I dont understand why its y<=x/2?

thanks!

[Asznee]

Hey guys!

I've attached a question below which has me absolutely stumped. It's a question from 2016 Insight and I've never come across a trend line where deseasonalised sales are predicted from sales; it doesn't make sense to me.

I've also attached the answer if needed.

Deseasonalised data is aiming to find an underlying trend in seasonal data,
When we're predicting data outside of the samples taken (forecasting for instance), we must use the deseasonilised regression line to find the deseasonalised value and the times it by that months sI, which will get it back to an actual prediction.

Summary, in forecasting, use deseasonalised regression line and then multiply that deseasonalised prediction by its si to convert it back to actual sales.


Any help would be greatly appreciated!

Hey guys!

I've attached a question below which has me absolutely stumped. It's a question from 2016 Insight and I've never come across a trend line where deseasonalised sales are predicted from sales; it doesn't make sense to me.

I've also attached the answer if needed.

Any help would be greatly appreciated!

[MattBro]

Can someone please help me with this financial math multiple choice question, it has got me. The answers B but even following their suggested method to work it out (attached also) I still can seem to get even close to their answer.

[Maya24]

can someone explain to me about inequalities
i.e " Xavier must work at least twice as many hours as Younnis"  and let x be Xavier and y be Younnis. I dont understand why its y<=x/2?

thanks!

So its saying that xavier has too work at least twice as many hours as yunnis meaning that he can work more. Therefore xavier has to work greater than or equal to yunnis, so when you substitute 2 into x,y becomes one thus the inequality is correct. If you substitute any number as x, y will always be  twices as less.

[mtDNA]

Can someone please help me with this financial math multiple choice question, it has got me. The answers B but even following their suggested method to work it out (attached also) I still can seem to get even close to their answer.

My friends and I were doing this question and we all got A, so we came to the conclusion that the solutions proposed an error (unless someone else can explain why it is B...)

[KidClutch]

Hey guys, can someone explain how the answer is C?
I'm pretty sure it's B but maybe I could be wrong

[AngelWings]

Hey all!
I'm free to talk for the next half day or so. If you have any last minute questions regarding Further, I'll try my best to help you all out.
Since I studied Further back in 2014, which had us study 3 modules + Data and Stats (Core, until 2016), I'm mostly familiar with:
- Data and Stats
- Graphs and Relations
- Geometry and Measurement
- the old Sequences and Series modules (which carries into some of the Financial Recursions section in the Core module).
I've personally also tried Matrices, but it's a bit of a hit and miss right now, but I'll try to help anyone with any last minute questions in general!
If not, one of the other trusty ANers will help you out! 


To all Class of 2017 Further students:

Finish that last practise exam, make the final touches to your bound reference and correct that final silly mistake. 
Take a deep breath, breathe in, breathe out and get a good night's rest.
You guys CAN and WILL conquer this. Keep your minds sharp and your game sharper.
You're almost there.
Good luck!   

Spoiler

Hey guys, can someone explain how the answer is C?
I'm pretty sure it's B but maybe I could be wrong

I think you might be right. At least, B is what I get from my rusty knowledge.
I think they didn't factor in that it was profit and accidentally calculated net earnings.

[rosiemac]

Hi guys if someone could help with this question that would be great!
i have no idea what to do with it
thanks heaps!!!

[AngelWings]

Hi guys if someone could help with this question that would be great!
i have no idea what to do with it
thanks heaps!!!

Alright, so I have never done this before, so please take this with caution. I - probably, maybe, likely - will get this wrong.

Spoiler

From this site, I took their formulas and input the following numbers in:
I = (12 months x 2 years) x $25 = $600
P = $500 - $50 = $450
t = 2 years
T = I - P = $600 - $450 = $150

Spoiler

Thus you substitute the numbers into the r_f formula to get:
r_f = (100 x 150) / (450 x 2) = 16.7% approximately. (Please excuse lack of LaTeX.)
My assumption then is that B is right.

EDIT: I failed on my first try. Good going, AngelWings. 

[mtDNA]

Hi guys if someone could help with this question that would be great!
i have no idea what to do with it
thanks heaps!!!

http://www.itute.com/wp-content/uploads/2009-vcaa-further-mathematics-exam-1-solutions.pdf

[mtDNA]

Alright, so I have never done this before, so please take this with caution. I - probably, maybe, likely - will get this wrong.

Spoiler

From this site, I took their formulas and input the following numbers in:
I = (12 months x 2 years) x $25 = $600
P = $500 - $50 = $450
t = 2 years

Spoiler

Thus you substitute the numbers into the r_f formula to get:
r_f = (100 x 600) / (450 x 2) = 66.7% approximately. (Please excuse lack of LaTeX.)
My assumption then is that E is right.

I initially thought E as well, but when I checked I saw it was B.

That being said, I’m 99% sure that hire-purchase isn’t in the course anymore (this was from 2009 VCAA)

[rosiemac]

I initially thought E as well, but when I checked I saw it was B.

That being said, I’m 99% sure that hire-purchase isn’t in the course anymore (this was from 2009 VCAA)

thank you!!!

[rosiemac]

thank you!!!!

[BlinkieBill]

hey need help with Q7 of matrices in 2017 NHT
how do you interpret two-step dominances??