Answer:
B. 12x + 8
Explanation:
2x + 5 + 4x - 1 + 2x + 5 + 4x - 1
Combine like terms.
6x + 5 - 1 + 2x + 5 + 4x + 1
8x + 5 - 1 + 5 + 4x - 1
12x + 5 - 1 + 5 - 1
12x + 10 - 1 - 1
12x + 10 - 2
Subtract 2 from 10 to get 8.
12x + 8
The perimeter of the rectangle is 12x + 8, which is B.