Question 306554
Mardi received an inheritance of $60,000. She invested part at 10% and deposited the remainder in
tax-free bonds at 8%. Her total annual income from the investments was $5800. Find the amount
invested at 10%.

let her invest $x at 10%

interest got from this investment will be 0.1*x

She will invest 60000-x at 8%

interest got from this will be 0.08(60000-x)

total interest she got was 5800

0.1x+0.08(60000-x)= 5800

0.1x - 0.08x + 4800= 5800

0.02x= 1000

x= 1000/0.02

x=50,000

$ 50,000 she invested at 10%