Adam pays $42 for 4 beads and 5 stickers.
2 beads cost as much as 1 sticker.
- How much is 1 bead?
- How much is 1 sticker?
- How much is 2 stickers and 4 beads?
(a)
Choose the smaller group to be 1 u.
Cost of 1 bead = 1 u
Cost of 2 beads = 2 u
Cost of 1 sticker = 2 u
Cost of 4 beads
= 4 x 1 u
= 4 u
Cost of 5 stickers
= 5 x 2 u
= 10 u
Total cost of 4 beads and 5 stickers
= 4 u + 10 u
= 14 u
14 u = 42
1 u = 42 ÷ 14 = 3
Cost of 1 bead
= 1 u
= $3
(b)
Cost of 1 sticker
= 2 u
= 2 x 3
= $6
(c)
Cost of 2 stickers and 4 beads
= 2 x 2 u + 4 x 1 u
= 4 u + 4 u
= 8 u
= 8 x 3
= $24
Answer(s): (a) $3; (b) $6; (c) $24