Adam spends $14.70 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 = 14.70
1 u = 14.70 ÷ 7 = 2.10
Cost of 1 sticker
= 2 u
= 2 x 2.10
= $4.20
(b)
Cost of 4 stickers
= 4 x 4.20
= $16.80
(c)
Cost of 1 bead and 4 stickers
= 2.10 + 16.80
= $18.90
(d)
Cost of 1 bead less than 4 stickers
= 16.80 - 2.10
= $14.70
Answer(s): (a) $4.20; (b) $16.80; (c) $18.90; (d) $14.70
