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?

Question

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

Henry · Answer

Check your 2-22-11,10:36am post.