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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? 35 42 63 105.

Respuesta :

abiolataiwo2015

Based on the given details the number of nickels that she have is 63 nickels.

Formulate

0.10d + 0.05n = 5.25, d=21

Let n =number of nickels

Let d =dimes

Substitute

0.10(21) + 0.05n = 5.25

2.10+ 0.05n = 5.25

0.05n=5.25-2.10

0.05n = 3.15

Divide both side by 0.05n

n = 3.15 / 0.05

n= 63 nickels

Inconclusion the number of nickels that she have is 63 nickels.

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