task no.2: use the data presented in a double horizontal paragraph below to answer the question tjat follow​

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Find the value of x for which the lines are parallel.

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?