Adam spends $12.60 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 = 12.60
1 u = 12.60 ÷ 7 = 1.80
Cost of 1 sticker
= 2 u
= 2 x 1.80
= $3.60
(b)
Cost of 4 stickers
= 4 x 3.60
= $14.40
(c)
Cost of 1 bead and 4 stickers
= 1.80 + 14.40
= $16.20
(d)
Cost of 1 bead less than 4 stickers
= 14.40 - 1.80
= $12.60
Answer(s): (a) $3.60; (b) $14.40; (c) $16.20; (d) $12.60