A small software corporation borrowed$320,000to 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$12,400and 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%

$amount borrowed at 5%$