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

Question

Lemur [1.5K]

3 years ago

7

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?

Mathematics

2 answers:

barxatty [35] · Answer 1 · 2021-12-16T19:33:33+03:00

<span>To find the number of nickels and dimes, we can use this equation: 0.10d + 0.05n = 5.25

We are given the information that Sonji has 21 dimes (which means that d=21). We can use the equation to find the number of nickels n.

0.10d + 0.05n = 5.25
0.10(21) + 0.05n = 5.25
2.10 + 0.05n = 5.25
0.05n = 3.15
n = 3.15 / 0.05
n = 315 / 5
n = 63

Sonji has 63 nickels.

Let's check our answer.
21(0.10) + 63(0.05) = 2.10 + 3.15 = 5.25
It seems that our answer is correct.</span>

trapecia [35] · Answer 2 · 2021-12-16T21:07:42+03:00

trapecia [35]3 years ago

6 0

Answer:

its C

Step-by-step explanation:

i know things...