Question

A jar contains nickels and dimes. There are 20 coins in the jar, and the total value of

the coins is $1.40. How many nickels and how many dimes are in the jar.
Write the system of equations used to solve this problem. Define the variables.
(Hurry)

Answer 1

Explanation:

n and d are the number of nickels and dimes, respectively.

"there are 20 coins"

n+d = 20

d = 20-n

"total value is $1.40"

0.05n + 0.10d = 1.40

0.05n + 0.10(20-n) = 1.40

-0.05n + 2 = 1.40

0.05n = 0.6

n = 12

d = 20-m = 8