Use gaussian elimination to find the complete solution to the system of equations, or state that none exists. show your work. 4x - y + 3z      =    12 x + 4y + 6z      = -32 5x + 3y + 9z      =    20

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?