VCE General & Further Maths Question Thread!

[Sherlock.Holmes]

Hey y'all
Im having trouble with this specific question from the VCAA 2016 Exam, question 3 Graphs and Relations module

I have read the examiners report (below), but i do not understand how m=n
Only 7% of the state got it fully right!!

[MB_]

Hey y'all
Im having trouble with this specific question from the VCAA 2017 Exam, question 3 Graphs and Relations module

I have read the examiners report (below), but i do not understand how m=n
Only 7% of the state got it fully right!!

If you rearrange \(Q=mx+ny\) in terms of \(y\) you get, \(y=\frac{-m}{n}x+\frac{Q}{n}\). \(\frac{-m}{n}\) corresponds to the gradient of the profit equation so \(\frac{-m}{n}=-1\) therefore \(m=n\)
Hopefully this helps!

[Sherlock.Holmes]

If you rearrange \(Q=mx+ny\) in terms of \(y\) you get, \(y=\frac{-m}{n}x+\frac{Q}{n}\). \(\frac{-m}{n}\) corresponds to the gradient of the profit equation so \(\frac{-m}{n}=-1\) therefore \(m=n\)
Hopefully this helps!

Oh okay, I understand it
Thank you so much

[Sherlock.Holmes]

Hi again.

I was having a bit of confusion with q8 Graphs and Relations module 2018 exam 1.

My two equations were 16.75=2.25+8x+10y and 30.35=2.25+20x+18y
Solving this simultaneously I got x=0.36 and y=1.16 (rounded to two decimal places)

The examiners report tho showed 8x+10y=14.20  and 20x+18y=27.80 which is the same as mine but they got rid of the $2.55
However, these two equations gave them x=0.4 and y=1.1

And the question was asking the exact cost of a ride, not the closest.

[MB_]

Hi again.

I was having a bit of confusion with q8 Graphs and Relations module 2018 exam 1.

My two equations were 16.75=2.25+8x+10y and 30.35=2.25+20x+18y
Solving this simultaneously I got x=0.36 and y=1.16 (rounded to two decimal places)

The examiners report tho showed 8x+10y=14.20  and 20x+18y=27.80 which is the same as mine but they got rid of the $2.55
However, these two equations gave them x=0.4 and y=1.1

And the question was asking the exact cost of a ride, not the closest.

These equations should be 16.75=2.55+8x+10y and 30.35=2.55+20x+18y

[TheEagle]

These equations should be 16.75=2.55+8x+10y and 30.35=2.55+20x+18y

equations:
1) 16.75= 8t +10d +2.55
2) 30.35= 20t + 18d +2.55
t= time d= distance
t= 0.4
d=1.1

Roys ride: 0.4* 10 + 1.1 *15= 20.5 (excluding the fixed fee of 2.55)
hence we must add 2.55
= $23.05 (option D)

[Sherlock.Holmes]

Ah yes, Thank you!

[rani_b]

Hey guys!

With those descriptive questions, I wanted to clarify what exactly is needed for 2 marks.

For example, 2019 NHT Core Q5biii (attached), the examiners report says the following:

A statement that clearly indicated the contention is supported with a change or difference in one
category of likelihood of attack considered and a statement similar to one of the following using
column percentages was required. Approximate percentages were acceptable.
• The percentage of animals with low likelihood of attack decreases with increased exposure to
attack during sleep – low exposure 91%, medium exposure 89%, high exposure 11%
• The percentage of animals with medium likelihood of attack changes with increased exposure
to attack during sleep – low exposure 6%, medium exposure 0%, high exposure 11%
• The percentage of animals with high likelihood of attack increases with increased exposure to
attack during sleep – low exposure 3%, medium exposure 11%, high exposure 79%

Basically, what does the first statement have to be? Because the examples they've given are in addition to another statement, but I thought the ones they provided already indicate a change/difference?

[ashmi]

Hey guys!

With those descriptive questions, I wanted to clarify what exactly is needed for 2 marks.

For example, 2019 NHT Core Q5biii (attached), the examiners report says the following:

A statement that clearly indicated the contention is supported with a change or difference in one
category of likelihood of attack considered and a statement similar to one of the following using
column percentages was required. Approximate percentages were acceptable.
• The percentage of animals with low likelihood of attack decreases with increased exposure to
attack during sleep – low exposure 91%, medium exposure 89%, high exposure 11%
• The percentage of animals with medium likelihood of attack changes with increased exposure
to attack during sleep – low exposure 6%, medium exposure 0%, high exposure 11%
• The percentage of animals with high likelihood of attack increases with increased exposure to
attack during sleep – low exposure 3%, medium exposure 11%, high exposure 79%

Basically, what does the first statement have to be? Because the examples they've given are in addition to another statement, but I thought the ones they provided already indicate a change/difference?

For the descriptive statement, you first need to say whether you agree or disagree and show if there is a relationship. In this case saying, "Yes, there is an association between the likelihood of attack and the exposure to attack during sleep" and then saying your statistics (In this case your percentages), however, you need to make sure that your writing shows that there is a clear connection between the two variables. (Make sure you have a general statement talking about the change). You could also write as the exposure increases, the chance of attack tends to increase, just anything that represents change.

If you think about it, just saying the percentages alone doesn't really answer the question by itself, so make sure your answer actually fulfils the questions. In this case, the question was, 'is there an association?'. (You know the answer is yes and the percentages are there to back up your answer!)

[KiNSKi01]

Hey for q8 networks exam 1 2018 is there an easy way to spot this answer - I could only get it through trial and error

Seems like there should be an easier way

[cats for the cup 2019]

Just wondering what would be the rough percentage required for further maths exam to get 40+?
i have done well with sacs and stuff - high A's and A+....

[MB_]

Just wondering what would be the rough percentage required for further maths exam to get 40+?
i have done well with sacs and stuff - high A's and A+....

90% via https://twmpublications.com/statistics

[Abdulfaiz]

 How do I attach a question ? Photo

[PhoenixxFire]

How do I attach a question ? Photo

Hey!
If you click reply and scroll down to just below the box there's a tab that says "attachments and other options" if you click there then you'll be able to add an image.
Alternatively, you can upload it to an image sharing site like imgur and use the BBCode link to post it here.

[jannatsd_1998]

are you sure it’s ok if I forgot to shade it I’m stressing out so muxh and if they don’t mark it I would be really upset