Blake has a total of $12,000 to invest in two accounts. One account earns 4% simple interest, and the other earns 8% simple interest. How much should be invested in each account to earn exactly $640 at the end of 1 yr?

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c