Further Math Exam 1: Answers + Discussion!

[Dan1995]

That Question 6 for Core was a tough one this year, however, drawing it on CAS produced A..not 100% though.
Question 9 for Core is B, -0.005, how'd you get C out of curiosity?
and Matrices Question 9 is C because B is actually the inverse of A

Got the same for matrices as you, checked it again after I posted.
For q9 in core you are correct, I may have entere the values incorrectly the first time.

[Lucho23]

Got the same for matrices as you, checked it again after I posted.
For q9 in core you are correct, I may have entere the values incorrectly the first time.

Cool 
That Question 6 though, that was really unfair for this year, but, I do think it's A cause of the CAS.

[Larri.e]

For Core, I got:
4. D
6. A
8. C
9. B
12. C

[Dan1995]

Cool 
That Question 6 though, that was really unfair for this year, but, I do think it's A cause of the CAS.

It's not too bad if you do the outlier calculations first.

[Han123]

Hey Dan just curious, question 5 for matrices, how did you get A?

[Lucho23]

For Core, I got:
4. D
6. A
8. C
9. B
12. C

8. Its a back-to-back so its one numericla variable (already car speed) and you had to find the categorical variable with two parts, which is sex E
12. This was in 2011 Q12, check the assesors report. DS = AS/1.25 therefore DS = 0.8 x AS...this means AS has to be reduced by 20%

[Dan1995]

For Core, I got:
4. D
6. A
8. C
9. B
12. C

Questions 4,6 and 9 and have been changed and discussed above.
Question 8 you needed to give the answer that contained two categorical variables, which was option E (male and female being the two categories).
Question 12 you actually want only 80% of the original sales, check the solutions from exam 1 in 2011, question 12, it was almost identical.

[bellaellaella]

Cool 
That Question 6 though, that was really unfair for this year, but, I do think it's A cause of the CAS.

I did it by using the formula for the upper fence and working from there

[Dan1995]

Hey Dan just curious, question 5 for matrices, how did you get A?

This is the problem with putting solutions up from a phone, that was also a typo! Sorry, the answer I got was C!

[Han123]

This is the problem with putting solutions up from a phone, that was also a typo! Sorry, the answer I got was C!

Oh thank god for that, thankyou for this!

[Dan1995]

Oh thank god for that, thankyou for this!

No worries, thanks for pointing it out, before it panicked too many people hopefully!
What did you think of the exam overall?

[vididid]

for 5 a for networks how is it a Hamiltonian path? i got b a Eulerian path as two of the vertices were odd and the others were even?

[Dan1995]

for 5 a for networks how is it a Hamiltonian path? i got b a Eulerian path as two of the vertices were odd and the others were even?

Question 5 in networks was about a minimal spanning tree?

[vididid]

also question 9 for geometry how is it d? because if you do it using ratios of 81:36 after squaring the height and then cross multiplying to find x which i got was 80?

[vididid]

sorry i meant question 1