Adam spends $15.10 on 2 beads and 3 stickers.
A bead costs $1.30 more than 1 sticker.
- How much does 1 bead cost?
- How much do 8 beads cost?
- How much do a sticker and 8 beads cost?
- How much do 8 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 + 1.30
Total cost of 2 beads and 3 stickers
= 2(1 u + 1.30) + 3 u
= 2 u + 2.60 + 3 u
= 2 u + 3 u + 2.60
= 5 u + 2.60
5 u + 2.60 = 15.10
5 u = 15.10 - 2.60
5 u = 12.50
1 u = 12.50 ÷ 5 = 2.50
Cost of 1 bead
= 1 u + 1.30
= 2.50 + 1.30
= $3.80
(b)
Cost of 8 beads
= 8 x 3.80
= $30.40
(c)
Cost of 1 sticker and 8 beads
= 2.50 + 30.40
= $32.90
(d)
Cost of 8 beads more than 1 sticker
= 30.40 - 2.50
= $27.90
Answer(s): (a) $3.80; (b) $30.40; (c) $32.90; (d) $27.90