Question

Bodhi has a collection of 175 dimes and nickels. The collection is worth $13.30. Which equation can be used to find n, the number of nickels in the collection?

0.1n + 0.05(n – 175) = 13.30
0.1n + 0.05(175 – n) = 13.30
0.1(n – 175) + 0.05 = 13.30
0.1(175 – n) + 0.05n = 13.30

Answer 1

Let n = number of nickels. Then dimes = 175 − n. Value: 0.05n (nickels) + 0.10(175 − n) (dimes) = 13.30. That matches option 4:
0.1(175 − n) + 0.05n = 13.30