how do you write 3.04 as a mixed number?
Answer:
43 dimes, 22 nickels
Step-by-step explanation:
n + d = 65....this is just dealing with the total number of coins
0.05n + 0.10d = 5.40....this is dealing with the actual $ amount...nickels are worth 0.05 and dimes are worth 0.10
n + d = 65....n = 65 - d
now we sub that back into our other equation
0.05(65 - d) + 0.10d = 5.40
3.25 - 0.05d + 0.10d = 5.40
-0.05d + 0.10d = 5.40 - 3.25
0.05d = 2.15
d = 2.15 / 0.05
d = 43 <==== 43 dimes
n + d = 65
n + 43 = 65
n = 65 - 43
n = 22 <=== 22 nickels