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Model Percent, Value, and Mixture Problems Algebraically
Grade Level
GRE
QR.094 Model Percent, Value, and Mixture Problems Algebraically
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A jar contains 60 coins, all nickels and dimes, worth $4.20. Let x be the number of dimes. Which choice gives the correct value equation and x?
A
0.10x + 0.05(60 - x) = 4.20; x = 24
B
10x + 5(60 - x) = 4.20; x = -59.16
C
0.10x + 0.05(60) = 4.20; x = 12
D
0.05x + 0.10(60 - x) = 4.20; x = 36
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