Adam pays $3.20 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 3 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 = 3.20
1 u = 3.20 ÷ 4 = 0.80
Cost of the sticker
= 3 u
= 3 x 0.80
= $2.40
(b)
Cost of 2 beads and 3 stickers
= 2 x 1 u + 3 x 3 u
= 2 u + 9 u
= 11 u
= 11 x 0.80
= $8.80
Answer(s): (a) $2.40; (b) $8.80