Can you tell me the procedure of these

x-7 = -2

x-1 = 7

9-x = -10
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Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

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?

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq