Adam pays $4.00 for a sticker and a bead.
The sticker costs 9 times as much as the bead.
- What is the cost of 1 sticker?
- How much is the cost of 2 beads and 5 stickers?
(a)
Cost of a bead = 1 u
Cost of a sticker = 9 u
Total cost of a bead and a sticker
= 1 u + 9 u
= 10 u
10 u = 4.00
1 u = 4.00 ÷ 10 = 0.40
Cost of the sticker
= 9 u
= 9 x 0.40
= $3.60
(b)
Cost of 2 beads and 5 stickers
= 2 x 1 u + 5 x 9 u
= 2 u + 45 u
= 47 u
= 47 x 0.40
= $18.80
Answer(s): (a) $3.60; (b) $18.80