The discount on a dvd is 50%. it is on sale for $10. what is the original price of the dvd?

1. are the triangles similar and if so why? what is the value of x? show your work.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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.