Answer:
6 men finish a piece of work in 8 days
1 men finish a piece of work in 8*6 days
4men will finish a piece of work in 48/4
days 
..
which is equal to 12 days
 
        
                    
             
        
        
        
20% of 89.75 is 17.95

so :

the Trina's coupon will subtract the answer by 10%:
10%of 71.8 is 7.18

so the final answer is:

she has to pay $64.62
hope this helps
 
        
        
        
Answer:
 
 
Step-by-step explanation:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
        
             
        
        
        
CALCULATE 5/8 + 3 1/4 x -3/6 - 2 5/12 = -3 5/12
        
             
        
        
        
To calculate for the equivalent price in units of per square feet, we need to convert the given units from per square yard to per square feet. We calculate as follows:
<span>$11 per square yard ( 1 yard per 3 feet )^2 = $0.14 per square feet
90 square feet (</span>$0.14 per square feet) = $12.22