Question

Reggie divided 14,500 dollars in two investments, one paying an interest of 10% and other 9%. If after one year the interest earned in the two investments is equal to 1430 dollars, find the amounts invested in the two investments.

Answer 1

interest=1,430$ for 1 yeer, with 14,500$ put up . . . averaej %=1430/14200= 9.8620689% . . . 9% av x+10% avy=1,430$ . . . x+y=14,500, so y=14,500-x . . . 0.09x +0.1*(14500-x)=1430 . . . 0.09x -0.1x +1450=1430 . . . -0.01x=-20... or +0.01x=+20 . . . x=2000$, so y=12,500$ . . . 9% av 2000=180$ . . . 10% av 12,500$=1250$ . . .