A+B+C=15000
.08A+.11B+.05C=1230
A-2B+OC=O
on my 3 by 4 augmented matrix calculator, I get 8000,4000, 3000. Check that
https://matrix.reshish.com/gauss-jordanElimination.php
1. A sum of $15,000 was invested in three funds for 1 year. At the end of the year Fund A had earned 8% interest, Fund B had
earned 11% interest and Fund C had earned 5% interest. A total of $1,230 was earned in interest. Twice as much money was initially
invested in Fund A as was in Fund B.
a. How much money was initially invested in each account (at the beginning of the year)? Write down your system of
three equations and the corresponding matrix. Fully explain your answers.
1 answer