Sonji has $5.25 in nickels and dimes. The coin value can be modeled by the equation 0.100 +0.05n=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? 35 42 63 105
Mathematics · Middle School · Tue Nov 03 2020
llm
Answered on
We have,
0.100d +0.05n=5.25
And, dimes, d = 21
Now, nickel, n = ?
So, 0.100(21) + 0.05n = 5.25
2.1 + 0.05n = 5.25
0.05n = 5.25 - 2.1
0.05n = 3.15
n = 3.15/0.05
n = 63
So, Number of nickels is 63
Hence, option (C) is correct.