Page 186 - Mathematics_F1

Exercise 5.9

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
FOR ONLINE READING ONLY
4 38 Tanzania Institute of Education
7. 70 and 80 9. x = , y =
5 5

Exercise 5.10

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
3
4
3 5 13 5
x
7. (a) ≤≤ (c) y <− or y >−
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 5.11

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 25/09/2025 15:02:14
25/09/2025 15:02:14
Mathematics form 1.indd 179