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Need help PLEASE this is to hard and its algebra

Need Help PLEASE This Is To Hard And Its Algebra class=

Sagot :

DWRead

Answer:

Step-by-step explanation:

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

"total of 31 coins"

n + d = 31

"amount of money is $2.25"

0.05n + 0.10d = 2.25

From the first equation:

d = 31-n

Substitute into the second equation:  

0.05n + 0.10(31-n) = 2.25

0.05n + 3.1 - 0.10n = 2.25

-0.05n = -0.85

n = 17

d = 31-n = 14

There are 17 nickels and 14 dimes.

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