Answer:
The opening is a rectangle
AC = 18 in
BD = 18 in
Step-by-step explanation:
9+9 = 18
since the diagonals are equal, it is a rectangle.
 
        
             
        
        
        
Answer:
-3x= 2×2-4
Step-by-step explanation:
-3x= 4-4
-3x= 0 
divide both sides by the co-efficient of x 
-3x/-3= 0÷-3 
x = 0
 
        
             
        
        
        
Answer:
3  7/50
Step-by-step explanation:
so you need them to become common denominators
a common multiple they both have would be is 77
6/7 becomes 66/77 and 3/11 becomes 21/77
now we divide
keep the 66/77 as is and flip 21/77 (keep, change, flip)
so now our equation looks like this: 66/77 x 77/21
and your answer is 3.14
but as a fraction it is 157/50 and to simplified it would be 3 7/50 (mixed fraction)