A means an area 
s side of the square, because of all sides are equal 
then Area=s*s or Area=s²
so
A=9*9=81yd²
        
             
        
        
        
Answer:
C. 105 
Step-by-step explanation:
<em><u>The formula for a regular polygon is:</u></em>
<em><u /></em> → p is the perimeter and a is the apothem
   → p is the perimeter and a is the apothem

105
 
        
             
        
        
        
Answer:
true
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
y=-5x-2
Step-by-step explanation:
y=mx+b
where m is the slope 
y=-5x+b
to solve for b, which is the y intercept, plug in (1,-7)
-7=-5(1)+b
-7=-5+b
-2=b
y=-5x-2