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 3 stickers and 5 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 3 stickers and 5 beads
= 3 x 1 u + 5 x 3 u
= 3 u + 15 u
= 18 u
= 18 x 0.80
= $14.40
Answer(s): (a) $2.40; (b) $14.40