I used to have these in my middle school, i think searching up the lesson and lesson name will give you the entire answer key for that specific sheet
I am sure you are trying to type

If that is it, then you should recall the law of exponents which says,

Let us share the exponent for each of them.

We now apply the law,

We now simplify to obtain,

If that is not the expression let me know so I will know how to help you
Answer: B
Step-by-step explanation: Okay so you add 6m and 1m to get 7m for that entire side. Then you have 3m on each side that is slanted. You finally add 5m.
7m + 3m + 3m + 5m = 18m^2