Sandra invested $8000 in two mutual funds. at the end of the year, the percent return on one fund, x, was 8% and the percent return on the other fund, y, was 3%. the combined return on both funds was $345.

which system of equations can be used to find how much sandra invested in each fund?

Abank manager wants to encourage new customers to open accounts with principals of at least $2 comma 500. he decides to make a poster advertising a simple interest rate of 3%. what must the principal be if the bank manager also wants to advertise that one can earn $10 the first month? can the poster correctly say, "open an account of $2 comma 500 and earn at least $10 interest in 1 month! "?