Using the digits 1 to 9 at most one time each, fill in the boxes to find the greatest and least possible slope

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

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?

Precalculus question, image attached.