Katie gave melanie $2.45 in dimes and nickels. if 10 coins were dimes how many coins were nickels? which equation models this problem? a. 2.45 • 10 - 5n b. 0.05n + 2.45d = 10 c. 10 • 0.10 + 0.05n = 2.45 d. 0.05 • 10 + 0.1 • d = 2.45

C. 10 • 0.10 + 0.05n = 2.45

Step-by-step explanation:

Let n be the number nickels and d be the number of dimes,

Since, 1 nickel = $ 0.05,

1 dime = $ 0.10,

Thus, the total value of n nickels and d dimes  = 0.05n + 0.10d

According to the question,

0.05n + 0.10d = 2.45 ----(1)

d = 10 ----(2)

From the above equation,

Hence, OPTION C is correct.

step-by-step explanation:

you divide the denominator by the numerator on both sides and if the quotients are equal then the fractions are equivalent