Adam pays $1.50 for a bead and a marble.
The bead costs 4 times as much as the marble.
- What is the cost of 1 bead?
- How much is the cost of 4 marbles and 2 beads?
(a)
Cost of a marble = 1 u
Cost of a bead = 4 u
Total cost of a marble and a bead
= 1 u + 4 u
= 5 u
5 u = 1.50
1 u = 1.50 ÷ 5 = 0.30
Cost of the bead
= 4 u
= 4 x 0.30
= $1.20
(b)
Cost of 4 marbles and 2 beads
= 4 x 1 u + 2 x 4 u
= 4 u + 8 u
= 12 u
= 12 x 0.30
= $3.60
Answer(s): (a) $1.20; (b) $3.60