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A small software corporation borrowed $390,000 to expand its software line. The corporation borrowed some of...

A small software corporation borrowed $390,000 to expand its software line. The corporation borrowed some of the money at 3%, some at 4%, and some at 5%. Use a system of equations to determine how much was borrowed at each rate when the annual interest was $15,000 and the amount borrowed at 4% was 2 1/2 times the amount borrowed at 3%. Solve the system using matrices.

amount borrowed at 3%      $
amount borrowed at 4%     $
amount borrowed at 5%      $
Math   Advanced-Math   
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