Adding anything to an additive identity results in the original thing. Here, ...
... [A] + [additive identity matrix] = [A] . . . . . . matrix A
The result is <u>matrix A</u>.
_____
The point of the additive identity is that it does not change anything when you add it.
we know that
A half-acre is equal to----------> 
Let
x---------> the length side of the building lot
y--------> the width side of the building lot
A------> Area of the building lot
x=5y-------> equation 1


--------> equation 2
substitute equation 1 in equation 2
![2,023.43=[5y]*y](https://tex.z-dn.net/?f=2%2C023.43%3D%5B5y%5D%2Ay)

<u>Find the value of x</u>

therefore
<u>the answer is</u>
the dimensions of the building lot are 100.55 m* 20.11 m
I am not sure but I think the answer is B.
34m + 14 = 30m + 22
34m - 30m = 22 - 14
4m = 8
m = 8/4
m = 2...multiple choice questions are worth 2 points each