For this case we must simplify the following expression:
We eliminate the parentheses taking into account that:

So:

We add similar terms taking into account that:
Equal signs are added and the same sign is placed.
Different signs are subtracted and the major sign is placed.

Answer:

 
        
             
        
        
        

 multiplied by 

= 75 hours
4 and a half hour repairs 6% of the entire boat so it is 
4 1/2 multiplied by 6/100's inverse number
 
        
                    
             
        
        
        
Answer:
6
Step-by-step explanation:
3/4 / 1/8
3/4 x 8/1
24/4
6
 
        
                    
             
        
        
        
Answer:
The time (t) it takes to clean an office building is <em><u>directly</u></em> <em><u>related</u></em> to the number of people (p) working.
t is proportional to p

 
        
             
        
        
        
Answer:

Step-by-step explanation:
=)
Hope this helps!