The robotics team needs to purchase $350 of new equipment. Each of the x students on the team plans to fundraise and contribute equally to the purchase. Which expression represents the amount that each student needs to fundraise?

A)350-x
B)350+x
C)350/x
D)350×x

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?