Adam spends $13.30 on 3 stickers and 4 beads.
A sticker costs 5 times as much as 1 bead.
- How much does 1 sticker cost?
- How much do 5 stickers cost?
- How much do a bead and 5 stickers cost?
- How much does 1 bead cost less than 5 stickers?
(a)
Let the cheaper item be 1 u.
Cost of 1 bead = 1 u
Cost of 1 sticker = 5 u
Cost of 3 stickers = 3 x 5 u = 15 u
Cost of 4 beads = 4 x 1 u = 4 u
Total cost of 3 stickers and 4 beads
= 15 u + 4 u
= 19 u
19 u = 13.30
1 u = 13.30 ÷ 19 = 0.70
Cost of 1 sticker
= 5 u
= 5 x 0.70
= $3.50
(b)
Cost of 5 stickers
= 5 x 3.50
= $17.50
(c)
Cost of 1 bead and 5 stickers
= 0.70 + 17.50
= $18.20
(d)
Cost of 1 bead less than 5 stickers
= 17.50 - 0.70
= $16.80
Answer(s): (a) $3.50; (b) $17.50; (c) $18.20; (d) $16.80
