Huang invested $9000 in mutual funds and bonds. The mutual fund earned 11% simple interest. The bonds earned 6% simple interest. At the end of one year, he had earned $815 in interest. How much had he invested at each rate?

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0

How many and of which kind of roots does the equation f(x)=2x^4−9x^3+17x^2−16x+6 have?

Maria has $10,000 to invest in two accounts.he decides to invest one part in an account with 5% interest and the rest in an account with 8% interest. at the end of the year he has earned $702,50 in interest.¿how much did maria invest in the 8% account?