Adam pays $2.70 for a bead and a sticker.
The bead costs 8 times as much as the sticker.
- What is the cost of 1 bead?
- How much is the cost of 3 stickers and 2 beads?
(a)
Cost of a sticker = 1 u
Cost of a bead = 8 u
Total cost of a sticker and a bead
= 1 u + 8 u
= 9 u
9 u = 2.70
1 u = 2.70 ÷ 9 = 0.30
Cost of the bead
= 8 u
= 8 x 0.30
= $2.40
(b)
Cost of 3 stickers and 2 beads
= 3 x 1 u + 2 x 8 u
= 3 u + 16 u
= 19 u
= 19 x 0.30
= $5.70
Answer(s): (a) $2.40; (b) $5.70