Answer:
U = -3
Step-by-step explanation:
U/-1 +-4=-1
Add 4 to each side
U/-1 +-4+4=-1+4
U / -1 = 3
Multiply each side by -1
U / -1  * -1 = 3* -1
U = -3
 
        
             
        
        
        
Answer:
198
Step-by-step explanation:
27/9 becomes three and then there is no need to divide 198 by three because it is being multiplied by three
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
Given that a machine produces defective parts with three different probabilities depending on its state of repair. 
condition             Good order         Wearing down               Needs main   Total
Prob                       0.8                            0.1                                   0.1              1
Defective               0.02                          0.1                                   0.3
Joint prob              0.016                         0.01                                0.03        0.056
a) 0.016
b) total = 0.056
c) If not defective from needs maintenance 
Prob for not defective = 
From machine that needs maintenance = 0.07
So reqd prob = 
 
        
             
        
        
        
Step 1. Multiply 5 by y and you get 5y 
Step 2. Multiply 5 by .4(2/5) 
Step 3. Your equations will look like 5y+2=-13 
Step 4. Subtract 2 from its self and -13 
Step 5. Your equation will be 5y=-15 
Step 6. Divide 5 from both sides 
Step 7. Your answer is y=-3