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07-02-2020
Mathematics

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a jar contains n nickels and d dimes. there are 17 coins in the jar, and the total value of the coins is $1.10. How many nickels and how many dimes are in the jar?

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MathPhys MathPhys

07-02-2020

Step-by-step explanation:

n + d = 17

5n + 10d = 110

Solve the system of equations using substitution or elimination. Using substitution:

5n + 10(17 − n) = 110

5n + 170 − 10n = 110

60 = 5n

n = 12

d = 5

There are 12 nickels and 5 dimes.

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