An investor has $300,000 to invest, part at 12% and the remainder in a less risky investment at 7%. if her investment goal is to have an annual income of $27,000, how much should she put in each investment?

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

Having a hard time understanding this question (see attachment).

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry. how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.