Answer:
D
Step-by-step explanation:
Add real numbers and add imaginary numbers 
(-7 + 3i)+(2 - 6i) = -7 + 2 + 3i - 6i
                         =  - 5 - 3i
 
        
                    
             
        
        
        
Sally is 6 and Tomas is 3 so 
6 +(3×2) 
and 6-3
        
             
        
        
        
Answer: 0.27648
Step-by-step explanation:
Given : The proportion of all  individuals have group A blood : p=0.040
Total individuals give blood : n= 6
Let X be the number of individuals have group A blood.
Since all individual are independent of each other.

Formula :  , where n= sample size , p = probability of getting success in each trial.
 , where n= sample size , p = probability of getting success in each trial.
The probability that exactly three of the individuals have group A blood. :

The probability that exactly three of the individuals have group A blood. is 0.27648
 
        
             
        
        
        
180 divided by 3 = 60
60 x 5 = 300
she can type 300 words in 5 minutes