Page 29 - PRAKTIS HEBAT ADDMATHS TG4

Additional Mathematics Form 4 Answers
Paper 2 (b) xy
1. x = 0.7595, y = 1.2785;
x = –0.1881, y = –1.5643 5.0
2. (a) (i) x – 5 (ii) 2x – 9
(b) 3 3 4.5
3. (a) (i) p = 5, q = –2 4.25
(ii) –2 , x , 5 4.0
(b) x – 5x + 4 = 0
2
4. (a) 4 3.5
(b) 6
(c) 8 3.0 2.95
5. a worker in factory / seorang pekerja di kilang:
RM150, a worker in office / seorang pekerja di 2.5
pejabat: RM220, a worker who deals with clients /
seorang pekerja yang berurusan dengan klien: RM270 2.0
6. (a) y = – 3 x – 1
2 1.5
(b) 3x + 3y – 16x – 74y + 339 = 0
2
2
15
12
7. (a) h = – —–, k = – —– 1.0
5 4
(b) y 0.5
1
y = 3x 2 – 12x – 15
21 0 0.05 0.10 0.15 0.20 0.25 0.30 x
(c) (i) 6.25
x (ii) 2.95
–2 –1 O 2 5 6 (iii) 0.89

–15 11. (a) (i) 15x – 3y
~
~

~
–27 (ii) 10x + 3y
~

(b) (i) 10mx + 3my
~
~
(c) y = –3x + 12x + 15 (ii) 15nx + (3 – 3n)y
2

8. (a) –9 – 4AB 5 3 ~ 2 ~
(b) log x = 3 ⇒ x = 1 000 (c) m = 5 , n = 5
10
log y = 2 ⇒ y = 100
10
2
LHS: x – 7xy = (1 000) – 7(1 000)(100) 12. (a) 25.13°
2
= 300 000 (b) 27.04 cm
RHS: 3000y = 3000(100) = 300 000 (c) 12.74 cm
LHS = RHS [shown] (d) 64.33° 2
(c) 5 (e) 292.82 cm
(d) x = 9.48, x = 0.52 13. (a) 112
9. (a) y = 2x – 3 (b) (i) 135
(ii) RM7.20

(b) y = – 1 x + 1 (c) 128
2 (d) RM60.70
(c) 1 8 5 , 1 2 14. (a) (i) 26.75 cm
5
(d) 21 3 unit 2 (ii) 24.10 cm 2
(iii) ∆PQT : 60.11 cm
10. (a) 5 ∆ PTS : 60.10 cm 2
∆ QRS : 88.47 cm 2
1 0.33 0.25 0.20 0.17 0.14 0.13 (b) 66.23 cm 2
x 15. (a) x = 150, y = 2.10, z = 4.50
xy 5.01 4.52 4.20 4.02 3.85 3.76 (b) 3
(c) RM1 485
(d) 137.5
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