Adam pays $1.60 for a sticker and a bead.
The sticker costs 3 times as much as the bead.
- What is the cost of 1 sticker?
- How much is the cost of 2 beads and 4 stickers?
(a)
Cost of a bead = 1 u
Cost of a sticker = 3 u
Total cost of a bead and a sticker
= 1 u + 3 u
= 4 u
4 u = 1.60
1 u = 1.60 ÷ 4 = 0.40
Cost of the sticker
= 3 u
= 3 x 0.40
= $1.20
(b)
Cost of 2 beads and 4 stickers
= 2 x 1 u + 4 x 3 u
= 2 u + 12 u
= 14 u
= 14 x 0.40
= $5.60
Answer(s): (a) $1.20; (b) $5.60