Adam spends $14.30 on 2 beads and 3 stickers.
A bead costs $1.40 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 + 1.40
Total cost of 2 beads and 3 stickers
= 2(1 u + 1.40) + 3 u
= 2 u + 2.80 + 3 u
= 2 u + 3 u + 2.80
= 5 u + 2.80
5 u + 2.80 = 14.30
5 u = 14.30 - 2.80
5 u = 11.50
1 u = 11.50 ÷ 5 = 2.30
Cost of 1 bead
= 1 u + 1.40
= 2.30 + 1.40
= $3.70
(b)
Cost of 3 beads
= 3 x 3.70
= $11.10
(c)
Cost of 1 sticker and 3 beads
= 2.30 + 11.10
= $13.40
(d)
Cost of 3 beads more than 1 sticker
= 11.10 - 2.30
= $8.80
Answer(s): (a) $3.70; (b) $11.10; (c) $13.40; (d) $8.80