We invested a total of $1,000. We invested one part of the money at 5% and the rest of the money at 6%. The total investment with interest at the end of the year was $1,054.50. How much money did we invest at 5%? Choose one
A) $400
B) $450
C) $500
D) $550
E) $600
Let x be the money invested at 5%.   1.05x+1.06(1000-x)=1054.50.   0.01x=1060-1054.50.   0.01x=5.50.   x=550.   The answer is $550.
<result>D</result>
We invested a total of $1,000. We invested one part of the money at 5% and the rest of the money at 6%. The total investment with interest at the end of the year was $1,054.50. How much money did we invest at 5%?