Apyramid is a. any one of the individual surfaces of a solid object. b. a pattern of two-dimensional shapes that can be folded to make a model of a solid figure. c. a solid figure with a base that is a polygon and sides that are triangles that meet at the top. d. the total area of the surface of a solid figure.

C.a solid figure with a base that is a polygon and sides that are triangles that meet at the top

Step-by-step explanation:

idk but i hope it help you :)

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.