Answer:
A. 7x + 3
Step-by-step explanation:
The perimeter of a 2D shape is the distance all the way around the outside.
⇒ perimeter = (2x + 1) + (x + 1) + (3x - 1) + (x + 2)
= 2x + 1 + x + 1 + 3x - 1 + x + 2
= 2x + x + 3x + x + 1 + 1 - 1 + 2
= 7x + 3
