Adam pays $4.80 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 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 = 4.80
1 u = 4.80 ÷ 4 = 1.20
Cost of the bead
= 3 u
= 3 x 1.20
= $3.60
(b)
Cost of 2 stickers and 5 beads
= 2 x 1 u + 5 x 3 u
= 2 u + 15 u
= 17 u
= 17 x 1.20
= $20.40
Answer(s): (a) $3.60; (b) $20.40