Question 1050943: Janice has a total of $3.40 in nickels and quarters. If she has twenty coins, how many are nickels and how many are quarters. Answer by addingup(3677) (Show Source):
You can put this solution on YOUR website! n+q = 20 subtract q from both sides:
n = 20-q We'll use this value for n next
:
0.05n+0.25q = 3.40 substitute for n
0.05(20-q)+0.25q = 3.40
1-0.05q+0.25q = 3.40
0.20q = 2.40
q = 12 She has 12 quarters and
20-12 = 8 nickels
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Check:
12*0.25 = 3
+
8*0.05 = 0.40
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Total : 3.40 Correct
:
John
