year 8 maths

626
2 a 18.6 cm b 64 m c 40 m
Extended-response question
d 1.8 m e 4000 cm 3 f 10 000 m 2 6 a 545.9 b 1008 c 0.614
3 a i 25.13 m ii 50.27 m 2
a (7a + x ) cm
b i 47.12 cm ii 176.71 cm 2
b 6a 2 cm 2
4 a i 25.71 m ii 39.27 m 2
c x = 5a
b i 17.85 cm ii 19.63 cm 2
d 12a cm
c i 54.85 mm ii 169.65 mm 2
e 216 cm 2
5 a 30 m 2 b 48 m 2
6 a V = 74.088 m 3 b V = 50 m 3 c V = 24 m 3
Equations 2
7 a 615.75 m 3 b 392 699.08 cm 3
c 1.26 m
Multiple-choice questions
or 1 256 637.06 cm 3
8 a 13 b 14.42
1 B 2 D 3 E 4 C 5 B
9 a 1530 b 0735
Short-answer questions
Extended-response question
1 a w = 9 b m = 72 c x = 1 d a = 2
a 15 − 2x
e w = −3 f x = 35
b x
2 a m = − 1 b a = −1 c x = 0 d x = 15 c x (15 − 2x ) 2
2
8 d 169 m 3
e a = 13
8
f a = 7 5
e x = 2.5
3 6
4 4 years
Fractions, decimals, percentages and financial
5 a x = ±3 b x = ±6 c a = ±12 mathematics
d y = 0 e no solution f no solution Multiple-choice questions
6 a F = 30 b m = 4
1 D
Extended-response question
a C = 5n + 1500
b R = 17n
c 125
2 C
3 C
4 E
5 A
6 A
d P = 12n − 1500
e $900
Short-answer questions
f −$300 (a loss)
1 a 18 b 1 c 5
Measurement and Pythagoras’ theorem
Multiple-choice questions
2 a 1 b 7 c 3 1 d − 2
4
5
4
21
e 1 9
f
3
10
1 B 2 B 3 D 4 E 5 D
3 a 5 b 1 5
c
2
8
21
Short-answer questions
4 a 9 2
b 3 4
c 5 8
5 a 6.93 b 7.58 c 4.03 d 6.51
1 a 500 cm b 180 cm c 90 000 cm 2
e 3854.8 f 792
7
Fraction
1
4
1
2
1
5
1
3
Decimal 0.25 0.5 0.2 0.3 . 0.6 . 0.8 0.95 0.99 0.005
Percentage 25% 50% 20% 33.3 . % 66.6 . % 80% 95% 99% 0.5%
2
3
4
5
19
20
99
100
1
200
Cambridge Maths NSW
Stage 4 Year 8 Second edition
ISBN 978-1-108-46627-1 © Palmer et al. 2018
Cambridge University Press
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