Answer:
z = -9.538546756+ 15.26486573i
Step-by-step explanation:
z = |z| cos theta + |z| i sin theta
  We know |z| and theta
z = 18 cos 122 +18i sin 122
z = -9.538546756+ 15.26486573i
 
        
             
        
        
        
I might not be right but I think William's fastest speed is 7.5 km/h. 
        
                    
             
        
        
        
0 0 0 1 2 2 4 thats the answer
        
             
        
        
        
Answer:
(2, 1 )
Step-by-step explanation:
Given endpoints (x₁, y₁ ) and (x₂, y₂ ) then the midpoint is
(  ,
,  )
 )
Here (x₁, y₁ ) = (7, 3) and (x₂, y₂ ) = (- 3, - 1) , then
midpoint = (  ,
,  ) = (
 ) = (  ,
,  ) = (2, 1 )
 ) = (2, 1 )
 
        
             
        
        
        
66
Step-by-step explanation:
pretty sure it's 66 because the two lengths added together is 66