Adam pays $2.40 for a bead and a sticker.
The bead costs 2 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 = 2 u
Total cost of a sticker and a bead
= 1 u + 2 u
= 3 u
3 u = 2.40
1 u = 2.40 ÷ 3 = 0.80
Cost of the bead
= 2 u
= 2 x 0.80
= $1.60
(b)
Cost of 3 stickers and 5 beads
= 3 x 1 u + 5 x 2 u
= 3 u + 10 u
= 13 u
= 13 x 0.80
= $10.40
Answer(s): (a) $1.60; (b) $10.40