Question

A coin bank contains $17.00 in pennies and nickels. If there are 1140 coins in the bank,

how many of them are nickels? (solving with elimination or substitution)

Answer 1

Explanation:

p=1140-n

.01p+.05n=17

.01(1140-n)+.05n=17

11.4-.01n+.05n=17

.04n=17-11.4

.04n=5.6

n=5.6/.04

n=140 the number of nickels

1140-140=1000 pennies

hope it helps!