Adam spends $16.90 on 2 beads and 3 stickers.
A bead costs 5 times as much as 1 sticker.
- How much does 1 bead cost?
- How much do 3 beads cost?
- How much do a sticker and 3 beads cost?
- How much does 1 sticker cost less than 3 beads?
(a)
Let the cheaper item be 1 u.
Cost of 1 sticker = 1 u
Cost of 1 bead = 5 u
Cost of 2 beads = 2 x 5 u = 10 u
Cost of 3 stickers = 3 x 1 u = 3 u
Total cost of 2 beads and 3 stickers
= 10 u + 3 u
= 13 u
13 u = 16.90
1 u = 16.90 ÷ 13 = 1.30
Cost of 1 bead
= 5 u
= 5 x 1.30
= $6.50
(b)
Cost of 3 beads
= 3 x 6.50
= $19.50
(c)
Cost of 1 sticker and 3 beads
= 1.30 + 19.50
= $20.80
(d)
Cost of 1 sticker less than 3 beads
= 19.50 - 1.30
= $18.20
Answer(s): (a) $6.50; (b) $19.50; (c) $20.80; (d) $18.20