The first option is correct I did this before hope this helps
5a - 4a = -9 - 8a
a = -9 - 8a
9a = -9
a = -1
Answer:
A polyhedron is a 3-dimensional figure that is formed by polygons that enclose a region in space. Each polygon in a polyhedron is called a face. The line segment where two faces intersect is called an edge and the point of intersection of two edges is a vertex
Step-by-step explanation:
hope this is good...
It seems as if it adds 2 blocks to the bottom end each time, and 1 to the top.
So, it would be a t-shape with those rules
