5. a)Write an expression, in terms of K, for the number
of dollars Cindy has.
• B = K – 6
• C = 2B = 2 (K – 6) = 2K – 12
b) Cindy has $4 less than Adi. Work out the value of
K.
2K – 12 = K – 4
2K – K = -4 + 12
K = 8
7. X x2 + 2x = Comment
2 4 + 4 = 8 Too small
2.1 4.41 + 4. 2 = 8.61 Too small
2.2 4.84 + 4. 4 = 9.24 Too small
2.3 5.29 + 4. 6 = 9.89 Approximately
8. Ocean Greatest depth in metres Greatest depth in
Fathoms
Atlantic 8400 15400
Indian
14700
8400
15400
× 14700 = 8018.18
≈ 8000
Complete the table
Round your answer to the nearest
hundred
11. Area of path = (8 + 1 + 1)(6 + 1 + 1) – (8 x 6)
m2
= (10 x 8) – (8 x 6)
= 80 – 48
= 32
Stones he needs
= 32 x 50 kg = 1600 kg = 1.6 tonnes
The number of stones he needs to buy
= 1.6 : 0.75
= 2.13333
So, he need to buy 3 bags of stones
1 m
1 m
Flower 6 m
bed
1 cm
1 m
8 m
Path