8

Mathematics

1 answer:

marissa [1.9K]3 years ago

3 0

Answer:

11 pennies

33 nickels

7 quarters

Step-by-step explanation:

Let x be the number of pennies, then the number of nickels is 3x.

There are 51 coins in total, so the number of quarters is 51 - x - 3x = 51 - 4x.

Amounts:

in pennis - x cents;
in nickels - 5(3x) = 15x cents;
in quarters - 25(51 - 4x) cents.

Tota amount = $3.51 = 351 cents.

Hence,

$x+15x+25(51-4x)=351\\ \\x+15x+1,275-100x=351\\ \\x+15x-100x=351-1,275\\ \\-84x=-924\\ \\84x=924\\ \\ x=11$

11 pennies

33 nickels

7 quarters

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