Yoko wanted to buy some puffs and scones. The cost of a puff was
35 the cost of a scone. A set of 6 puffs and 3 scones cost $13.20. What was the total amount Yoko had to pay for 7 puffs and 6 scones?
| |
Puffs |
Scones |
Total |
| Number |
6 |
3 |
|
| Value |
3 u |
5 u |
|
| Total value |
18 u |
15 u |
33 u |
Total cost of puffs and scones
= 18 u + 15 u
= 33 u
33 u = 13.2
1 u = 13.20 ÷ 33 = 0.4
Cost of 7 puffs and 6 scones
= 7 x 3 u + 6 x 5 u
= 21 u + 30 u
= 51 u
= 51 x 0.4
= $20.40
Answer(s): $20.40
