Adam pays $1.40 for a bead and a marble.
The bead costs 6 times as much as the marble.
- What is the cost of 1 bead?
- How much is the cost of 5 marbles and 4 beads?
(a)
Cost of a marble = 1 u
Cost of a bead = 6 u
Total cost of a marble and a bead
= 1 u + 6 u
= 7 u
7 u = 1.40
1 u = 1.40 ÷ 7 = 0.20
Cost of the bead
= 6 u
= 6 x 0.20
= $1.20
(b)
Cost of 5 marbles and 4 beads
= 5 x 1 u + 4 x 6 u
= 5 u + 24 u
= 29 u
= 29 x 0.20
= $5.80
Answer(s): (a) $1.20; (b) $5.80