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28 May, 12:52

A box contains 35 coins either nickels or dimes all worth $2.90. How many dimes are in the box?

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  1. 28 May, 16:39
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    There are 23 dimes in the box

    Step-by-step explanation:

    Let nickels=n

    Let dimes = (35-n)

    Equation: 0.05n+0.10 (35-n) = 2.90

    Multiply both sides by 100: 5n+10 (35-n) = 290

    -5n+350=290

    -5n=-60

    n=12

    35-12=23

    Therefore, there are 23 dimes in the box
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