algebra
posted by Joel on .
Select the set of equations that represents the following situation: Mary invested one amount at 7% simple interest, and a second amount at 5% interest, earning $29.80 in one year. If she had switched the amounts, she would have earned $35.00. What were the two amounts?
(Points : 3)
0.07x + 0.05y = 29.80; 0.07y + 0.05x = 35.00
7x + 5y = 29.80; 7y + 5x = 35.00
0.07x + 0.05y = 35.00; 0.07x + 0.05y = 29.80
7x + 5y = 35.00; 7x + 5y = 29.80

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