a tour bus averaged 50 miles per hour between two cities on the first leg of a trip and 45 miles per hour on the return trip. the return trip took 1/2 hour longer. find the distance between the two cities

Need on this geometry question. explain how you did it.

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i