Adam pays $3.20 for a bead and a sticker.
The bead costs 3 times as much as the sticker.
- What is the cost of 1 bead?
- How much is the cost of 2 stickers and 4 beads?
(a)
Cost of a sticker = 1 u
Cost of a bead = 3 u
Total cost of a sticker and a bead
= 1 u + 3 u
= 4 u
4 u = 3.20
1 u = 3.20 ÷ 4 = 0.80
Cost of the bead
= 3 u
= 3 x 0.80
= $2.40
(b)
Cost of 2 stickers and 4 beads
= 2 x 1 u + 4 x 3 u
= 2 u + 12 u
= 14 u
= 14 x 0.80
= $11.20
Answer(s): (a) $2.40; (b) $11.20