Question

Donald has a bunch of nickels and dimes in his piggy bank. There are 100 coins in the bank that make a total of $6.60 in change. If n is the number of nickels and d is the number of dimes, how many of each type of coin does Donald have?

Answer 1

Answer:

78 nickels and 22 dimes

Step-by-step explanation:

Nickels = n, Dimes = d

Number of coins = 100

• n + d = 100

Total sum in the piggy bank = $6.60

• 5n + 10d = 660

Consider the first equation in the second:

• 5(100 -d) + 10d = 660
• 500 - 5d + 10d = 660
• 5d = 110
• d = 110/5
• d = 22
• n = 100 - 22
• n = 78

Answer: nickels 78 and dimes 22

Answer 2

Answer:

78 nikes and dimes 22

solving these linear equations simultaneously, x = 22y = 8z= 11hence the answer is B. 11

Step-by-step explanation: