Answer:
7/20
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
13
Step-by-step explanation:
4+(-3)-2*(-6)
4-3-2*-6
1-(-12)
1+12
13
 
        
                    
             
        
        
        
Answer:
Its not A and B and I know that, but can you show the rest so I can see if its C because the rest of the picture isn't there
 
        
             
        
        
        
I don’t know what the question is but it would be 8 divides out evenly
        
                    
             
        
        
        
Answer:

For this case the reliability of the sytem would be given by:

R1= 0.95, R2 =0.95, R3= 0.5, R4 = 0.79 , R5 = 0.6
And replacing we got:

Step-by-step explanation:
We can assume that the system work in series
If we have in general n units the reliability of the system is the probability that unit 1 succeeds and unit 2 succeeds and all of the other units in the system succeed. fror n units must succeed for the system to succeed. The reliability of the system is then given by:

For this case the reliability of the sytem would be given by:

R1= 0.95, R2 =0.95, R3= 0.5, R4 = 0.79 , R5 = 0.6
And replacing we got:
