Xandra wanted to buy some muffins and wafers. The cost of a muffin was
17 the cost of a wafer. A set of 5 muffins and 2 wafers cost $11.40. What was the total amount Xandra had to pay for 7 muffins and 8 wafers?
| |
Muffins |
Wafers |
Total |
| Number |
5 |
2 |
|
| Value |
1 u |
7 u |
|
| Total value |
5 u |
14 u |
19 u |
Total cost of muffins and wafers
= 5 u + 14 u
= 19 u
19 u = 11.4
1 u = 11.40 ÷ 19 = 0.6
Cost of 7 muffins and 8 wafers
= 7 x 1 u + 8 x 7 u
= 7 u + 56 u
= 63 u
= 63 x 0.6
= $37.80
Answer(s): $37.80
