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Self Practice 4.5a New house: Self Practice 5.1c
Total cost of monthly rental
1. 75% and petrol 1. (a) 12 (b) 30
2. 7 : 13 (c) 45 (d) 9
= RM368.80
Self Practice 4.5b Lai Huat should not 2. (a) 8x + 4y
consider moving to the new (b) 80 kg
1. (a) 25% house because he can save 3. (a) p(m – n) or p(n – m)
(b) 40% RM30.40 while staying in (b) RM3
(c) 7 500 000% his current house.
2. RM11.25 Self Practice 5.1d
8. (a) RM3.60
1. (a) 6k and 2k
Self Practice 4.5c (b) Mr Ong should go back to (b) x and 9xy
2
his office to get his parking
1. (a) 20% (c) ab , 2a and 5b
(b) 18 : 50 or 9 : 25 ticket. The parking charge is 3
RM10.60 compared to the (d) 4pq, 7x , 8p q and 1
2
lost ticket penalty of RM20. 2
Mastery 4.5 2. (a) –8 (b) –y 2
3 (c) –8x (d) 8y 2
1. (a) ; 0.375 Chapter 5 Algebraic
8
(b) 37.5% Expressions Self Practice 5.1e
2. (a) 3 : 2 Self Practice 1. (a) Like terms
(b) Same 5.1a (b) Unlike terms
(c) The length of each side of 1. (a) k represents the mass of (c) Like terms
P9Q9R9 is 1.5 times the each student in the class. (d) Unlike terms
length of the corresponding k has a varied value because
side of PQR. the mass of each student is Mastery 5.1
3. Buying online is a better choice. different. 1. k is the amount of money
The online price is 50 sen (b) x represents Zaini’s marks invested and d is the dividend
cheaper than the price offered in a Mathematics test. given.
by the bookshop. x has a fixed value because k has a fixed value because it is
it is Zaini’s score for the the initial amount invested and
Let’s Practise Mathematics test. d has a varied value because the
1. 6 : 9 1 : 15 (c) h represents the distance dividend rate will vary based on
between Arman’s house and economic conditions every year.
6 : 90 2 : 3 his school. m – 5
h has a fixed value because 2. 1 2 2 kg
9 : 60 3 : 20 the distance between 2
Arman’s house and his 3. (xy – 225) m
2. (a) 4 : 5
1
school is the same for every 4. (a) 4 (b) 142
(b) For aquarium A, add 4 fish. 2
For aquarium B, add 5 fish. trip. 5. (a) n – 4x
(d) c represents the temperature
3. (a) 36 at the peak of Gunung (b) RM22.20
(b) 9 : 8 Kinabalu in a day. 6. (a) p – 3x
(c) Nurin, 84
c has a varied value because (b) 35
4. 1.8 l bottle the temperature at the peak
5. 0900 of Gunung Kinabalu is 7. Algebraic Coefficient Variable
always changing within a term
6. 10 m day.
–10ab c
7. (a) 0.804 litre
Self Practice 5.1b –10ac b
(b) Current house: y + z –10abc
Total cost of monthly rental 1. (a) x – 7 (b) 9 –10b ac
and petrol (c) 4x (d) mp + nq –10 abc
= RM338.40 (e) h – 2k or other possible answers.

312
Answers

14 Ans Math F1.indd 312 11/10/16 12:23 PM