Solve the problem by writing an appropriate system of equations and using the inverse of the coefficient matrix to solve the system. A $100,000 trust is to be invested in bonds paying 8%, CDs paying 7%, and mortgages paying 10%. The bond and CD investment must be triple the mortgage investment. To earn an $8000 annual income from the investments, how much should the bank invest in bonds? $25,000 $50,000 $30,000 $15,000