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17 December, 15:35

A jar contains n nickels and d dimes there are 30 coins in the jar and the total value of the coins is $2.10 Set up and solve a system of equations to find how many nickels and how many dimes are in the jar

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Answers (2)
  1. 17 December, 17:12
    0
    Yes I agree with the person above me who have answered before me
  2. 17 December, 18:26
    0
    12 dimes and 18 nickels

    Step-by-step explanation:

    Equations given by word problem:

    n + d = 30

    0.05n + 0.1d = 2.10

    How I solved them:

    d = 30 - n

    0.05n + 0.1 (30 - n) = 2.10

    0.05n + 3 - 0.1n = 2.10

    -0.05n = -.09

    Divide both sides by - 0.05

    n = 18

    18 + d = 30

    d = 12
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