How are a triangular pyramid and a rectangular pyramid different?

They differ by the base.

Imagine that you drew a triangle and a rectangle on a piece of paper.

Then, pick a point above the paper, and connect all vertices of the triangle with that point. That is a triangular pyramid.

Similarly, pick a point above the rectangle, and connect each vertex of the rectangle with that point. That is a rectangular pyramid.

y/x=18

step-by-step explanation:

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.