Page 185 - Mathematics

Exercise 5.7

1. 69 and 40
3. 16 girls and 20 boys
5. The cost of one pencil is Tshs 500 and one pen is Tshs 800
4 38 Tanzania Institute of Education
7. 70 and 80 9. x = , y =
5 5

Exercise 5.8

1. (a) 1, 2, 3, 4, 5 (b) 0, 1, 2, 3, 4 (c) 5, 7, 9, 11, …

(d) 2,− − 1, 0, 1, 2, 3, 4
2
3. (a) y > 2 or y <− (b) 3− ≤ y ≤− 1 (c) 3−≤ y ≤ 3
5 5
(d) −< y < (e) y > 0 or y <−
4
2 2
5. (a) x > (b) x ≤ 5.7 (c) x ≥ (d) y <− 7
4
3
3 5 13 5
7. (a) ≤≤ (c) y <− or y >−
x
8 8 3 3
10 8
(b) x ≥ or x ≤ (d) b ≥− 4
9 9

11 5
9. (a) 1 x≤≤ (c) 35 c− < <−
3 9
6
(b) y <− 1 or y > 5 (d) x ≤− 2 or x ≥
5

Exercise 5.9

Mathematics Form One
2
1. Possible width 5 cm> 3. x < 3 5. x ≥ 3
7. x < 9. The smallest integer is 0 and the
2
largest integer is 4

179

Mathematics form 1.indd 179 25/10/2024 09:52:19
25/10/2024 09:52:19
Mathematics form 1.indd 179