Question 1025163
Call what she invests at 9%, x.  That means she invests 2x at 3%.  The setup then looks like this:
.09x + .03(2x) = 2925
.09x + .06x = 2925
.15x = 2925
x = 2925/.15 = $19500 invested at 9% and then
2x = $39000 invested at 3%