SOLUTION: Select the set of equations that represents the following situation: Mary invested one amount at 5% simple interest, and a second amount at 4% interest, earning $21.32 in one year.

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Select the set of equations that represents the following situation: Mary invested one amount at 5% simple interest, and a second amount at 4% interest, earning $21.32 in one year.      Log On


   

Question 479731: Select the set of equations that represents the following situation: Mary invested one amount at 5% simple interest, and a second amount at 4% interest, earning $21.32 in one year. If she had switched the amounts, she would have earned $25.84. What were the two amounts?
A)0.05x + 0.04y = 25.84; 0.05x + 0.04y = 21.32
B)5x + 4y = 21.32; 5y + 4x = 25.84
C)0.05x + 0.04y = 21.32; 0.05y + 0.04x = 25.84
D)5x + 4y = 25.84; 5x + 4y = 21.32
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
13:11:42): Select the set of equations that represents the following situation: Mary invested one amount at 5% simple interest, and a second amount at 4% interest, earning $21.32 in one year. If she had switched the amounts, she would have earned $25.84. What were the two amounts?
A)0.05x + 0.04y = 25.84; 0.05x + 0.04y = 21.32
B)5x + 4y = 21.32; 5y + 4x = 25.84
C)0.05x + 0.04y = 21.32; 0.05y + 0.04x = 25.84
D)5x + 4y = 25.84; 5x + 4y = 21.32
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Ans: C
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Cheers,
Stan H.
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