mixture problems

Question

An investment firm invested $2000 into two accounts. 1,500$ went to an 8% annual rate account. The rest went to a 5% 
annual rate account. The interest per year amounted to how much?

Answer 1

If 1500 went to one account (8%), 500 went to the other (5%).

 

0.08(1500) + 0.05(500)

120 + 25

175

 

The two accounts make $175 in interest.