mrus
18.11.2020 •
Mathematics
a pile of 40 coins consists of nickels and dimes. the total value of coins is $2.7 find the number of each type of coin?
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Ответ:
Explanation:
Dime = 0.10$
Nickel = 0.05$
Assume that all the coins were dimes
40 x 0.10$ = 4$
4$ - 2.7$ = 1.3$
1.3$/0.05$ = 26
Thus, 26 coins are nickels.
40 - 26 = 14
And 14 coins are dime.
Let’s check:
14(0.10) + 26(0.05) = 2.7$
1.4$ + 1.3$ = 2.7$
2.7$ = 2.7$
Ответ: