Answer:
y=-10x+3
Step-by-step explanation:
The slope is -10
 
        
             
        
        
        
#1
That is false..one could have side lengths of 9 and 1, and the other could have side lengths of 3. Both the areas would be 9, but the figures would not be congruent.
#2
That is true, they must both have the same side length to have the same perimeter, therefore they will also have the same area.
        
             
        
        
        
20 • 12 is 240
1/2 • 12 • 4 is 24
so 264
        
             
        
        
        
All you have to do is solve for x. See the following steps below.
Step 1. Subtract 

 from both sides

Step 2. Simplify 

 to 

