Answer:
since the room is rectangular and has 4 sides
2 sides have the same length
18*2= 36m
80*2=160m
then add the sums...
the answer is 196 meters
Step-by-step explanation:
If you mean (3n-2m)^2 then the answer is
9n^2-12mn+4m^2
So B
first replace x with 1p
then solve the given equation
i.e
5x-5
=6(10)-5
=60-5
=55
Equation solved by a student has been given as,

Solution in each step,
Step 1 → 
Step 2 → 
Step 3 → 
Step 4 → 
In step 2, addition of two terms have been done → 
Therefore, property used to reach at step 2 → Addition property of equality
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C I took the test and it was it