Answers to General Maths Exam (1 Viewer)

PC

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For those interested ...

Double checked a few of them. Let me know of any errors.

In any case, it's done now. Move on to the next exam or if you've finished, have a drink for me!

SECTION I
1. B
2. A
3. D
4. A
5. C
6. A
7. D
8. C
9. A
10. B
11. B
12. C
13. C
14. B
15. A
16. D
17. C
18. C
19. A
20. D
21. D
22. B

SECTION II
QUESTION 23
(a) (i) $5000
(ii) Rose's investment, by $2000
(iii) 1 year
(b) (i) 144 m3
(ii) 12 hours
(iii) 8000 litres
(c) (i) 45 crocodiles
(ii) 60 crocodiles

QUESTION 24
(a) (i) 11.4
(ii) Removing the outlier will decrease the mean but the median will stay the same.
(b) 3.6 sec
(c) (i) €480
(ii) The Australian dollar will now buy more Euros. The gradient of the line will increase.
(d) (i) The females that attend tend to be older than the males.
(ii) 64
(iii) 172.5
(iv) In the grouped frequency distribution table, the class centres are used as the ages and not the actual ages. From the stem-and-leaf plot, the actual ages are used.

QUESTION 25
(a) If two coins are tossed, the probability of obtaining at least one head is 3/4.
(b) 58 degrees
(c) (i) 1/5
(ii) diagram, probabilities are 5/10, 3/10, 2/10, then 4/9, 3/9, 2/9, 5/9, 2/9, 2/9, 5/9, 3/9, 1/9
(iii) 14/45
(d) (i) Test 2 mark is better as it is further from the mean. z-score for Test 1 is 0.48 and for Test 2 is 0.67.
(ii) 126 students

QUESTION 26
(a) (i) 5 km/h
(ii) 18 km
(iii) 236 degrees
(b) (i) 9.1%
(ii) $41145
(iii) $8443.50
(c) Total value = 100(1.06)21 + 100[ (1.06)21 – 1 / 0.06] = $4339.23
Interest = 4339.23 – 22 x 100 = $2139.23

QUESTION 27
(a) (i) Length 12 m, Width 6 m
(ii) A = l(l – 6)
(iii) If length is 6 then width is 0 which is not possible. If length is less than 6 then width is negative which is also not possible.
(iv) Length 15 m, width 9 m
(v) graph - two bits, horizontal line up to A = 150 then diagonal line.
(vi) Company B
(b) (i) C = 24 + 7300d
(ii) d = 0.031
(iii) Cost is $476.60 so does not double
(iv) 4660 hours

QUESTION 28
(a) (i) 5/18
(ii) +$0.75
(iii) Loss of 25 cents per game
(b) 22.784 cm2
(c) (i) 50.4 cm2
(ii) 3500 cm2
 
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ronan01

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has anyone got the exam? they wouldnt let us take them...
 

ronan01

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is someone allowed to post it up (or send me it).. i forget half the multi choice questions and stuff lol
 
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RaisedByWolves said:
24 d) ii) three males are aged 22, but 2 males and 2 females are aged 64 so the mode is 64
SHIT. I didn't see that. Arghhhhh!
 

champo14

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RaisedByWolves said:
24 d) ii) three males are aged 22, but 2 males and 2 females are aged 64 so the mode is 64
adr;jbkweg;jbW;JBKWg;bjgeWOB'Eg'obds

I did the mean. WHY!
 

AlexW23

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25. d) ii) I PUT A PERCENTAGE, so hopefully i get 1/2 marks.
 

Tom2nv

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Hey question 3 of multiple choice i think as 280 x 4 =1120 x 0.175 = 196 as its 17.5 % of the pay she wuld receive had she been workin thus its A in my opinion
 

champo14

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Question 28b) I had area as 22.78cm2. What am I doing wrong?

Side length is 2.828, right?
 

pattii

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QUESTION 27: A) A RECTANGULAR PLAYING SURFACE IS TO BE CONSTSRUCTED SO THAT THE LENGTH IS 6 METRES MORE THAT THE WIDTH

.... did u read the q? the graph was on the length and area not on the lenght and width....
 

Tom2nv

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But doesnt $1316 sound strange as he is not working yet he is receiving more money in the 4 weeks than if he had been working the 4 weeks
 
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champo14 said:
Question 28b) I had area as 22.78cm2. What am I doing wrong?

Side length is 2.828, right?
Hmm... wtf. I got 22.784.

To find the side:
H^2 = 2^2 + 2^2 = 8
H = SQRT(8)

A = 2.598 * (SQRT(8))^2 + (0.5 * 2 * 2) = 22.784

Did I do something wrong?

PC, how'd you get 32.784cm^2?
 
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pattii

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champo14 said:
Question 28b) I had area as 22.78cm2. What am I doing wrong?

Side length is 2.828, right?
i found the side by using pythagoras..

so c^2=2^2=2^2
c^2=8
so i squarerooted the 8 n got
22.828

then used the formula given

so 2.598x22.828^2
=20.784

then 1/2xbxh
1/2x2x2
=2

so 2+20.784
=22.784

your right=]
 

pattii

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Snowfreq said:
Hmm... wtf. I got 20.784.

To find the side:
H^2 = 2^2 + 2^2 = 8
H = SQRT(8)

A = 2.598 * (SQRT(8))^2 = 20.784

Did I do something wrong?
dude you forgot the triangle
 

blake13

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Hi

Was just wondering if it would be possible for someone who was able to take the general maths 2007 hsc exam home, to post it. We weren't able to take our copy home. Thanks
 

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