Adam pays $35 for 3 stickers and 2 beads.
10 stickers cost as much as 5 beads.
- How much is 1 sticker?
- How much is 1 bead?
- How much is 2 beads and 5 stickers?
(a)
Choose the smaller group to be 1 u.
Cost of 10 stickers = Cost of 5 beads
Cost of 2 stickers = Cost of 1 bead
Cost of 1 sticker = 1 u
Cost of 1 bead = 2 u
Cost of 3 stickers
= 3 x 1 u
= 3 u
Cost of 2 beads
= 2 x 2 u
= 4 u
Total cost of 3 stickers and 2 beads
= 3 u + 4 u
= 7 u
7 u = 35
1 u = 35 ÷ 7 = 5
Cost of 1 sticker = 1 u = $5
(b)
Cost of 1 bead
= 2 u
= 2 x 5
= $10
(c)
Cost of 2 beads and 5 stickers
= 2 x 2 u + 5 x 1 u
= 4 u + 5 u
= 9 u
= 9 x 5
= $45
Answer(s): (a) $5; (b) $10; (c) $45