The original perimeter is 22 cm.
If both sides are doubled, the length would be 16 cm and the width would be 6 cm. 
The perimeter would be 44 cm. 
22/44 is 50%.
        
             
        
        
        
The associative property because you are moving the parentheses 
        
             
        
        
        
Answer:
B=8
Step-by-step explanation:
B/4=B-6/4
4B=16B-96
96=12B
B=8
 
        
             
        
        
        
Answer:
t = 7 + 3i
Step-by-step explanation:
(t-7)^2 + 18 = 9
(t-7)^2 = 9 - 18
(t-7)^2 = -9
(t-7) = sqrt(-9) = |3| sqrt(-1)
t = 7 + 3i