Emma spent
29 of her money on 7 cookies and 9 muffins. If each cookie costs thrice as much as a muffin, how many cookies could Emma buy with the rest of her money?
| |
Cookies |
Muffins |
| Number |
7 |
9 |
| Value |
3 u |
1 u |
| Total value |
21 u |
9 u |
Cost of 1 muffin = 1 u
Cost of 1 cookie = 3 u
Total cost of 7 cookies and 9 muffins
= 7 x 3 u + 9 x 1 u
= 30 u
Fraction of Emma's money left
= 1 -
29 =
7929 of Emma's money = 30 u
19 of Emma's money = 30 u ÷ 2 = 15 u
79 of Emma's money = 15 u x 7 = 105 u
Number of cookies that Emma could buy
= 105 u ÷ 3 u
= 35
Answer(s): 35
