B and C I believe .............
Step-by-step explanation:
Given binomial is:

Answer:
The unknown dimension is 35
Step-by-step explanation:
The perimeter of a rectangle is l+l+w+w or 2l+2w (l=length, w=width)



then we subtract 14 from 84



Let's check our answer

<u>Hope this helps :-)</u>
106, 129, 152, 175, 198 count by 23