Which function describes the arithmetic sequence shown? The sequence is : -4, 0, 4, 8, 12, 16,
Answer choices:
A) f(x) = 4x + 8
B) f(x) = 4x - 8
C) f(x) = -4x - 8

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?