Adam pays $4.20 for a sticker and a bead.
The sticker costs 6 times as much as the bead.
- What is the cost of 1 sticker?
- How much is the cost of 3 beads and 4 stickers?
(a)
Cost of a bead = 1 u
Cost of a sticker = 6 u
Total cost of a bead and a sticker
= 1 u + 6 u
= 7 u
7 u = 4.20
1 u = 4.20 ÷ 7 = 0.60
Cost of the sticker
= 6 u
= 6 x 0.60
= $3.60
(b)
Cost of 3 beads and 4 stickers
= 3 x 1 u + 4 x 6 u
= 3 u + 24 u
= 27 u
= 27 x 0.60
= $16.20
Answer(s): (a) $3.60; (b) $16.20