Answer:
6%
Step-by-step explanation:
- 90 + 60 = 150
- 7 + 2 = 9
- Set up a proportion:   
- Cross multiply, then divide: 9 × 100 = 900, 900 ÷ 150 = 6
- So, 6% of students in 6th grade were left-handed
I hope this helps!
 
        
                    
             
        
        
        
Answer:
-10/3 is the answer
Step-by-step explanation:
Given are two complex numbers as

Recall Demoivre theorem as
(cosA+isinA)(cos A+isin B) = cos(A+B)+isin(A+B)
Hence here we have sum of angles  as
A+B = 63+117 =180

=
Since sin180=0 and cos 180=-1
 
        
             
        
        
        
Answer: x=4
Step-by-step explanation: Add 3 to both sides,  Divide both sides by 22
 
        
                    
             
        
        
        
Answer:
-5
Step-by-step explanation:
 
        
             
        
        
        
Answer:
75%
Step-by-step explanation:
90/ 120 is the same as 75 or 3/4 so  75% of 120 is 90