Adam pays $42 for 4 stickers and 5 beads.
8 stickers cost as much as 4 beads.
- How much is 1 sticker?
- How much is 1 bead?
- How much is 5 beads and 2 stickers?
(a)
Choose the smaller group to be 1 u.
Cost of 8 stickers = Cost of 4 beads
Cost of 2 stickers = Cost of 1 bead
Cost of 1 sticker = 1 u
Cost of 1 bead = 2 u
Cost of 4 stickers
= 4 x 1 u
= 4 u
Cost of 5 beads
= 5 x 2 u
= 10 u
Total cost of 4 stickers and 5 beads
= 4 u + 10 u
= 14 u
14 u = 42
1 u = 42 ÷ 14 = 3
Cost of 1 sticker = 1 u = $3
(b)
Cost of 1 bead
= 2 u
= 2 x 3
= $6
(c)
Cost of 5 beads and 2 stickers
= 5 x 2 u + 2 x 1 u
= 10 u + 2 u
= 12 u
= 12 x 3
= $36
Answer(s): (a) $3; (b) $6; (c) $36