Adam spends $13.90 on 2 beads and 3 stickers.
A bead costs $2.70 more than 1 sticker.
- How much does 1 bead cost?
- How much do 3 beads cost?
- How much do a sticker and 3 beads cost?
- How much do 3 beads cost more than 1 sticker?
(a)
Let the cheaper item be 1 u.
Cost of 1 sticker = 1 u
Cost of 1 bead = 1 u + 2.70
Total cost of 2 beads and 3 stickers
= 2(1 u + 2.70) + 3 u
= 2 u + 5.40 + 3 u
= 2 u + 3 u + 5.40
= 5 u + 5.40
5 u + 5.40 = 13.90
5 u = 13.90 - 5.40
5 u = 8.50
1 u = 8.50 ÷ 5 = 1.70
Cost of 1 bead
= 1 u + 2.70
= 1.70 + 2.70
= $4.40
(b)
Cost of 3 beads
= 3 x 4.40
= $13.20
(c)
Cost of 1 sticker and 3 beads
= 1.70 + 13.20
= $14.90
(d)
Cost of 3 beads more than 1 sticker
= 13.20 - 1.70
= $11.50
Answer(s): (a) $4.40; (b) $13.20; (c) $14.90; (d) $11.50
