Adam pays $4.20 for a sticker and a bead.
The sticker costs 2 times as much as the bead.
- What is the cost of 1 sticker?
- How much is the cost of 4 beads and 2 stickers?
(a)
Cost of a bead = 1 u
Cost of a sticker = 2 u
Total cost of a bead and a sticker
= 1 u + 2 u
= 3 u
3 u = 4.20
1 u = 4.20 ÷ 3 = 1.40
Cost of the sticker
= 2 u
= 2 x 1.40
= $2.80
(b)
Cost of 4 beads and 2 stickers
= 4 x 1 u + 2 x 2 u
= 4 u + 4 u
= 8 u
= 8 x 1.40
= $11.20
Answer(s): (a) $2.80; (b) $11.20