Adam spends $14.40 on 3 beads and 4 stickers.
A bead costs 4 times as much as 1 sticker.
- How much does 1 bead cost?
- How much do 4 beads cost?
- How much do a sticker and 4 beads cost?
- How much does 1 sticker cost less than 4 beads?
(a)
Let the cheaper item be 1 u.
Cost of 1 sticker = 1 u
Cost of 1 bead = 4 u
Cost of 3 beads = 3 x 4 u = 12 u
Cost of 4 stickers = 4 x 1 u = 4 u
Total cost of 3 beads and 4 stickers
= 12 u + 4 u
= 16 u
16 u = 14.40
1 u = 14.40 ÷ 16 = 0.90
Cost of 1 bead
= 4 u
= 4 x 0.90
= $3.60
(b)
Cost of 4 beads
= 4 x 3.60
= $14.40
(c)
Cost of 1 sticker and 4 beads
= 0.90 + 14.40
= $15.30
(d)
Cost of 1 sticker less than 4 beads
= 14.40 - 0.90
= $13.50
Answer(s): (a) $3.60; (b) $14.40; (c) $15.30; (d) $13.50