A basket of beads contains 8 red beads, 6 yellow beads, and 6 green beads

assuming you mean addition: addition and subtraction are reverse operations.

step-by-step explanation:

a net is a diagram that shows a “flattened” view of a solid. in a net, each face and base is shown with all of its dimensions. a net can also serve as a pattern to build a three-dimensional solid.

a pyramid is a three-dimensional object with a base that is a polygon and triangular faces that meet at one vertex.

" the net of a triangular pyramid consists of four triangles. the base here we are given of the pyramid is a equilateral   triangle, and the lateral faces are also triangles "

you probably already have the answer but anyways it's b. 15.0

step-by-step explanation: