Algebra investment
posted by Maka .
An investor had a total of 25,000 put into a portfolio of stocks, bonds, and mutual funds. In one year, he earned 8% on the stock investment, 10% on the bond investment and 6% on the mutual funds investment. The annual(simple interest) return was $1860. if the amount invested in the mutual fund was twice the investment in bonds, then how much did he originally put in each of the three individual investments?

an investor invested a total of 1800$ in two mutual funds. one fund earned a 5 % profit while the other earned a 3% profit. if the investor's total profit was 80$, how much was investad in mutual fund?

An investor earned $1,462.50 on an investment of $90,000 in 65 days. Find the annual simple interest rate earned on the investment.