2 years ago

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

Mathematics

1 answer:

weeeeeb [17]2 years ago

3 0

Answer:

Step-by-step 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

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