Mrs Finch first grade class was holding a used book sale. Some books were sold for $0.25 and others sold for $0.35. The first customer spent 3.15 for 11 books? How many $0.25 books and $0.35 books did the customer buy?

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.