Jane wanted to buy some croissants and wafers. The cost of a croissant was
37 the cost of a wafer. A set of 7 croissants and 3 wafers cost $12.60. What was the total amount Jane had to pay for 9 croissants and 7 wafers?
| |
Croissants |
Wafers |
Total |
| Number |
7 |
3 |
|
| Value |
3 u |
7 u |
|
| Total value |
21 u |
21 u |
42 u |
Total cost of croissants and wafers
= 21 u + 21 u
= 42 u
42 u = 12.6
1 u = 12.60 ÷ 42 = 0.3
Cost of 9 croissants and 7 wafers
= 9 x 3 u + 7 x 7 u
= 27 u + 49 u
= 76 u
= 76 x 0.3
= $22.80
Answer(s): $22.80
