The perimeter is just all the lines around the outside of the shape so basically take all the numbers and add them together to get the answer
1) 180-(44+45)=91
2) 180-(53+37)=180-90=90
ANSWER

EXPLANATION
The given line passes through;
(-1,-1) and it is parallel to x + y = 3.
This line given to us can be rewritten as
y=-x+1
It has slope m=-1.
The line parallel to this line also has slope m=-1.
We obtain the equation of the line using the formula:

We substitute the slope and the point to obtain:



The equation of the line is

Hello Fantaysias,
How are you doing? I know this is kind of late, but here goes nothing! Yes, it is a linear equation, you know this because, the input always will result with the same output. Plus, since it has a slope, which is 10 by the way, it also confirms that this is linear! Linear means, that if you put these plots on a line, it will create a straight line! Hope I helped!
Thank you,
Darian D.