C the answer is C because if x=3 then that would make the 2 rectangles equal 6 and if you add 6 to 5 you get 11 which is how many cubes are in the other box
Answer:
148
Step-by-step explanation:
Perimeter = 2*(length + width)
=2*(-3x +4 + 5x - 2)
=2*(2x + 2)
=2*2x + 2*2
=4x + 4