Question

Sonji has $5.25 in nickels and dimes.The coin value can be modeled by the equation 0.10 d plus 0.05 n equals 5.25, where d represents the number of dimes and n represents the number of nickels. If Sonji has 21 dimes, how many nickels does she have?
A) 35
B) 42
C) 63
D) 105

Answer 1

First .10*21 is $2.10 so we can subtract so 5.25-2.10 is 3.15 so we know we have to get nickels so 3.15/.5 is 63 so the answer is C sonji has 63 nickels

Answer 2

Answer:

N = 63

Step-by-step explanation:

The equation given in the question is

0.10d + 0.05n = 5.25

Putting d = 21, we get

(0.10 * 21) + 0.05n = 5.25

2.1 + 0.05n = 5.25

0.05n = 3.15

n = 63

Hope this helps!!!

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