It was alright, a lot of thinking and tedious work but doable. I
lost one mark due to carelessness, read "product is 7" as "sum is
7". Minus one mark. Shall I type out all my answers? Do tell me if
yours are different :(
1a) (7p-14)/p
b) (3g - 2f) / (f + 2g)
c)(i) (x + 11/2)^2 + (-45.25) (Not sure about this....)
c)(ii) x= 1.23(2dp), x=-12.23(2dp)
2a) 6.17m
b) 1.89m
c) 30.1m sq
d) 6.47m
3a) $22 500
b) Materials = $0.30, wages= $0.24
c) 75 souvenirs an hour
d) 19.3%
e) $1.60
4a) u5= 2^4 + 9 = 25(shown)
b) u6= 2^5 + 11 = 43
c) 2^(n-1) + 2n – 1
d) 524327
e)(i) (was able to show)
e)(ii) 2^(n-2) + 2
5a) (1200/m) cents
b) (2m^2 + 1194m – 3600) / m
c) (was able to show)
d) m= 75
e) 18 cents
6a) angle ALD = angle CLB (vert opp angles)
Angle CBL = angle ADL (angles in same segment)
Therefore 3rd angle is the same.
All 3 angles are the same, therefore triangle LAD is similar to
LCB.
b)(i) 90 degrees
(ii) 14 degrees
(iii) 32 degrees
(iv) 14 degrees
7a)(i) 1.35 radians
(ii) 766.2cm sq
b)(i) 52.1cm
(ii) 13.9 degrees (unsure)
8a)(i) 2.04cm
(ii) 43.3cm sq
b) (I forgot to write down my answer in my question paper, I got
8.38cm cube I think)
c)(i) (managed to show)
(ii) 27.3%
9a) p= -3.2
c) x= 0.4, x=3.3
d) -2.59
f)(i) x= 0.45
(ii) A= 1, B= -12, C= 12 (I think this is wrong I anyhow do
haha)
10a) frequency by column: 3, 7, 12, 13, 5
(ii)(a) 15kg
(b) 4.45kg
(iii) Cumulative frequency curve will be steeper (I don’t know
about this!!)
b)(i) I drew a tree diagram, 36 branches in all (don’t know which
diagram they wanted)
(ii)(a) 1/5
(b) 5/36
(c) Answer is 0 (I got this wrong; careless)
(d) 7/15 (unsure)
I got 76.1 for qn 7(b)(ii)
