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Self Practice 5.2a 7. Let n represent a number. Mastery 6.1
1. (a) 8x + 7y n + 7 = x
n 1. (a) x – 8 = 15
(b) 5ab – bc + 12 = y
2 (b) 14y = 42
(c) 17xy + 7k – 7 n (c) p + 34 = 3p
x + y = (n + 7) + 1 2
(d) 6p – 3q – 3pq 2 2. (a) 16 (b) 4 (c) 2
(e) fg – 6mn = n + 7 + n
1
2 3. (a) – (b) – 4 (c) 24
3
Self Practice 5.2b x + y = n + 7 2
2 10
1. (a) (pq) 3 4. (a) 3 (b) 7 (c) 6
(b) (6a – 1) 8. RM60(3h + 4k – 2p – 3q)
2
5. 20 boys
3
(c) (8x + 3y)
9. (6xy + 8x + 18) m
2. (a) (2 + 7x)(2 + 7x) 6. 1 hour and 30 minutes
10. 27°F
(b) (h – 4k)(h – 4k)(h – 4k) 7. Small table = 2.16 m 2
(c) (5p + q)(5p + q)(5p + q)(5p + q) Large table = 4.32 m
2
Chapter 6 Linear Equations
Self Practice 5.2c Self Practice 6.2a
3
1. (a) 15x 4 (b) –28m n Self Practice 6.1a
1. (a) Yes, because the equation
(c) 4p qr 1. (a) Yes, because the equation has two variables, h and
5
2b 2 has one variable m and the k, and the power of each
5
2. (a) 4x y (b)
3a power of m is 1. variable is 1.
4
6p r
(c) – (b) Yes, because the equation
5q has one variable p and the (b) No, because the equation
has only one variable.
5 2
10m 3 3p y power of p is 1.
3. (a) (b) –
3n 2 2x (c) No, because the equation (c) Yes, because the equation
has two variables, x and y. has two variables, x and
Mastery 5.2 y, and the power of each
(d) No, because the highest variable is 1.
4 3 power of the variable k is 2.
1. (a) x + pq – 8y + 11
3 2 (d) No, because the highest
(b) 8ab – 11mn Self Practice 6.1b power of variable p is 2.
2. (2d + 7y) cm 1. (a) x = 12
3. 4n + 4 6 Self Practice 6.2b
(b) 5y = 40
4. n = 3, a = 9, b = –2 1. (a) x + y = 258
(c) 4x + 1 000 = 1 400
2
5. 6(2 + 3p) cm (b) p – q = 15
2
2. (a) Subtract 1 from a number, (c) 8x + 5y = 265
12y 4
3
6. (a) (b) 2pq the result is 6. (d) x + 2y = 40
z
(b) When Edri’s score is added
7. (a) 5pr 2 (b) 14x y z 2. (a) The total number of
3 3 2
to 10, it will be 78.
aluminium cans and glass
12a b (c) The total mass of four packs
3 2
2
8. = 4a b cm bottles collected during the
3ab of rice is 50 kg.
recycling campaign was 465.
Let’s Practise (b) The difference between
Self Practice 6.1c
1. a = 8, b = 4, c = 4 the length and width of a
1. (a) 13 (b) 2 rectangle is 3 cm.
2. RM(120 – 12x – 7y)
(c) 12 (d) 10
3. –11
(e) 3 (f) –15 Self Practice 6.2c
4. RM4.80
1. (a) (7, 0), (8, 1), (9, 2)
5. 2k + 10 Self Practice 6.1d
(b) (0, 1), (2, –3), (4, –7)
mx 1. 53 marks
6. (a) + 2my (c) (2, 0), (6, 24), (1, – 6)
5 2
2. 266 cm or other valid answers
(b) RM33.40
313
Answers
14 Ans Math F1.indd 313 11/10/16 12:23 PM