Adam spends $14.30 on 2 stickers and 3 beads.
A sticker costs 5 times as much as 1 bead.
- How much does 1 sticker cost?
- How much do 3 stickers cost?
- How much do a bead and 3 stickers cost?
- How much does 1 bead cost less than 3 stickers?
(a)
Let the cheaper item be 1 u.
Cost of 1 bead = 1 u
Cost of 1 sticker = 5 u
Cost of 2 stickers = 2 x 5 u = 10 u
Cost of 3 beads = 3 x 1 u = 3 u
Total cost of 2 stickers and 3 beads
= 10 u + 3 u
= 13 u
13 u = 14.30
1 u = 14.30 ÷ 13 = 1.10
Cost of 1 sticker
= 5 u
= 5 x 1.10
= $5.50
(b)
Cost of 3 stickers
= 3 x 5.50
= $16.50
(c)
Cost of 1 bead and 3 stickers
= 1.10 + 16.50
= $17.60
(d)
Cost of 1 bead less than 3 stickers
= 16.50 - 1.10
= $15.40
Answer(s): (a) $5.50; (b) $16.50; (c) $17.60; (d) $15.40