Here is the graph of an exponential function corresponding to a geometric sequence
Which of the following is the explicit formula for the geometric sequence?

A. an = 9(3)*1
O B. a = 9(3)"+1
O C. an = 9(3)-1
O D. a = 9(3)+1

Which of the following statement about pascal's triangle are true?

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?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15