Page 17 - PRAKTIS HEBAT ADDMATHS TG4

Additional Mathematics Form 4 Answers
19
2
2
15. (a) 1 – —, —– , maximum point / titik maksimum 2. Let/ Katakan
x = value of a calculator/ nilai satu kalkulator
5
5
4
(b) r = — y = value of a pen drive/ nilai satu pemacu pena
5 z = value of an earphone/ nilai satu fon telinga
(c) y x + y + z = 150
2 19
– –, – x + 2y + z = 210
5 5
3 x 2x + y + 3z = 280
–2 0 3 3. a = 3, b = –14, c = –5
–9 4. p = –3, q = –4
5. (a) m + n = 5, m – n = 5 (b) m = 3, n = 2
2
2
6. (a) p = 6q, 2q = p + 8 (b) p = 24
2
–54
PAPER 2
3
2
n
n
16. (a) p = —, q = m – —– (b) x = – — 1. x = –3, y = 5, z = 2
2 4 2 2. x = 3, y = 5, z = –2
5
57
17. (a) p = —, q = —–; p = –3, q = 6 14 7
2 4 3. x = —, y = —; x = 1, y = –2
2
3
(b) y 4. x = 0.5504, y = –0.7520; x = 0.1929, y = 1.0355
3 5. x = –4.622, y = –3.244; x = –2.178, y = 1.644
4
1
19
x 6. x = —, y = 9; x = – —, y = —
0 3 2 3 3
11
11
2
y = (x – 3) – 6 7. x = 3, y = 4; x = —, y = – —
–6 10 2
18. (a) p = 4, q = 8 8. shirt: RM15, trousers: RM23, necktie:RM9
(b) baju: RM15, seluar: RM23, tali leher: RM9
f(x) 9. y
80
24 (8, 24)
f(x) = 2(x – 4) – 8 70
2
x
0 2 6 60
(4, –8)
50
(c) f(x) = –2(x – 4) + 8
2
19. width/ lebar = 10 m, depth/ kedalaman = 1 m 40
20. (a) P(x)
30
(2 500, 240 000)
20
10
x
0 50.51 4 949.49
–10 000 x
–4 –3 –2 –1 0 1 2 3
(b) RM240 000 (2.4, 29.5), (–1.6, 13.5)
3
(c) 2 500 units/ unit 10. x = —, y = 14; x = 5, y = 7
2
11. (4, 2), (–2, 8)
HOTS PRACTICES PAK-21 12. 35 m, 28 m, 21 m
2
1. x – 2x – 3 = 0
HOTS PRACTICES PAK-21
2. x , –2, x . 4
3. r . 8 1. p = 10, q = 3
4
Pract ice Systems of Equations Pract ice Indices, Surds and Logarithms
spm 3 Sistem Persamaan spm Indeks, Surd dan Logaritma
PAPER 1
PAPER 1 5
1. has no solution / tiada penyelesaian 1. 3p – — 6
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