Question

Sonji has $5.25 in nickels and dimes.The coin value can be modeled by the equation 0.10d + 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

Answer 1

Thank you for asking this question. Here is your answer:

0.10d + 0.05n = 5.25

d = 21

We will put this in the equation:

(0.10 * 21) + 0.05n = 5.25

2.1 + 0.05n = 5.25

0.05n = 3.15

n = 63

The final answer for this question is 63

If there is any confusion please leave a comment below.

Answer 2

Sonji has $5.25 in nickels and dimes. the coin value can be modelled by the equation 0.1d + 0.05n = 5.25

here d represents the number of dimes and n represents the number of nickels .

Given, Sonji has 21 dimes.
e.g., d = 21

0.1 × 21 + 0.05n = 5.25

2.1 + 0.05n = 5.25

0.05n = 3.15

n = 315/5 = 63

hence, Sonji has 63 nickels.