Adam pays $33 for 5 stickers and 4 beads.
2 stickers cost as much as 5 beads.
- How much is 1 sticker?
- How much is 1 bead?
- How much is 5 beads and 4 stickers?
(a)
LCM of 2 and 5 = 10
Cost of 2 stickers = 10 u
Cost of 1 sticker = 10 u ÷ 2 = 5 u
Cost of 5 beads = 10 u
Cost of 1 bead = 10 u ÷ 5 = 2 u
Cost of 5 stickers = 5 x 5 u = 25 u
Cost of 4 beads = 4 x 2 u = 8 u
Total cost of 5 stickers and 4 beads
= 25 u + 8 u
= 33 u
33 u = 33
1 u = 33 ÷ 33 = 1
Cost of 1 sticker
= 5 u
= 5 x 1
= $5
(b)
Cost of 1 bead
= 2 u
= 2 x 1
= $2
(c)
Cost of 5 beads and 4 stickers
= 5 x 2 u + 4 x 5 u
= 10 u + 20 u
= 30 u
= 30 x 1
= $30
Answer(s): (a) $5; (b) $2; (c) $30