square pyramid
step-by-step explanation:
square prism looks like nothing like that
triangular prism has a rectangular base instead of a square base
tetrahedron has a triangular base
2(2x + 3) = -4 + 2(2x + 5)
4x + 6 = -4 + 4x + 10
4x + 6 = 4x + 6
4x - 6 + 6 = 4x - 6 + 6
4x = 4x
x = x
unlimited solutions.
the answer is 18 units because there are 18 small cubes inside the rectangle
hope this and p.s i am also in k12