In planning her​ retirement, Liza deposits some money at 4.5​% ​interest, with twice as much deposited at 5​%. Find the amount deposited at each rate if the total annual interest income is ​$2755.She deposited ​$___ at 4.5​% and ​$___ at 5​%.

Question
Answer:
For this problem, we can assume that we deposits X money at 4.5% interest, than we can know that 2X were deposited at 5% interest, therefore we can get the equation of:  4.5%*X+5%*2X=2755, than we can get X=19000, so the 2X=38000, than we can concluded that: she deposited $19000 at 4.5% and $38000 at 5%.
solved
general 11 months ago 8359