Answer:
#of blocks in a single layer of the wall * 3(x)-9/4
Step-by-step explanation:
So, let Y be the length of the wall. It will be made from the building blocks described.
If the perimeter of a square block is 12x-9 and the formula for the perimeter of a square is 4s (where s = length of a side). Then one side of the square is the perimeter divided by 4.
s = (12x-9)/4 = 3x-9/4
In order to find the length of the wall, multiply s by the number of blocks used to build one level of the wall.
