Gavin saved $16 to buy a pack of baseball cards. his father gives him $4 more. if each pack of cards costs $5,how many packs can gavin buy?

he had 16 and his dad gave him 4 more:

16 +4 = 20 dollars total

 each pack cost $5

20 / 5 = 4

 he can buy 4 packs

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 "