Adam spends $16.10 on 2 stickers and 3 beads.
A sticker costs 2 times as much as 1 bead.
- How much does 1 sticker cost?
- How much do 4 stickers cost?
- How much do a bead and 4 stickers cost?
- How much does 1 bead cost less than 4 stickers?
(a)
Let the cheaper item be 1 u.
Cost of 1 bead = 1 u
Cost of 1 sticker = 2 u
Cost of 2 stickers = 2 x 2 u = 4 u
Cost of 3 beads = 3 x 1 u = 3 u
Total cost of 2 stickers and 3 beads
= 4 u + 3 u
= 7 u
7 u = 16.10
1 u = 16.10 ÷ 7 = 2.30
Cost of 1 sticker
= 2 u
= 2 x 2.30
= $4.60
(b)
Cost of 4 stickers
= 4 x 4.60
= $18.40
(c)
Cost of 1 bead and 4 stickers
= 2.30 + 18.40
= $20.70
(d)
Cost of 1 bead less than 4 stickers
= 18.40 - 2.30
= $16.10
Answer(s): (a) $4.60; (b) $18.40; (c) $20.70; (d) $16.10