A boat travels 120 miles downriver in less time than it takes to travel 80 miles upriver. The boat makes the entire trip (both directions) in 12 hours. If the speed of the boat in still water is 20mph, what is the speed of the current?

Flashback to semester a. are triangles pqr and stu congruent? what is the congruency that proves they are congruent? what is the perimeter of triangle pqr? show your work.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

In the diagram of circle a what is m