SOLUTION: A women has $34000 to invest. She invests some at 17% and the balance at 20%. Her total annual interest income is $6425. Fine the amount invested at each rate.
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Question 1028497: A women has $34000 to invest. She invests some at 17% and the balance at 20%. Her total annual interest income is $6425. Fine the amount invested at each rate.
You can put this solution on YOUR website! Part I 17.00% per annum ------------- Amount invested =x
Part II 20.00% per annum ------------ Amount invested = y =
34000
Interest----- 6425
Part I 17.00% per annum ---x
Part II 20.00% per annum ---y
Total investment
x + 1 y= 34000 -------------1
Interest on both investments
17.00% x + 20.00% y= 6425
Multiply by 100
17 x + 20 y= 642500.00 --------2
Multiply (1) by -17
we get
-17 x -17 y= -578000.00
Add this to (2)
0 x 3 y= 64500
divide by 3
y = 21500
Part I 17.00% $ 12500
Part II 20.00% $ 21500