6. dexter has 128 shells. he needs 283 more shells for his art project. how many shells will dexter use for his art project?

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?

Find the nonpermissible replacement for binthis expression.b2/5b +5

An object in geometry with no width, length or height is a(n):