Answer:
Step-by-step explanation:
15 plus 15 plus 15 is 45 - 15 =30 
 
        
                    
             
        
        
        
Common denominator between 3 and 4 is 12. 2/3 becomes 8/12, and 3/4 becomes 9/12. Add them to get 17/12, which equals 1 and 5/12 lbs.
 
        
             
        
        
        
Its 40
----------
............
        
             
        
        
        
Answer:
Area of the photograph is 
Step-by-step explanation:
The piece of cardboard is a square with side length as x.
The border that surrounds the photo is 3 inches on each side. So the length of the photograph is reduced by 3 inches for 2 times.
Hence, the length of photograph is =
The border also surrounds the photo is 4 inches on both the top and the bottom. So the width of the photograph is reduced by 4 inches for 2 times.
Hence, the width of photograph is =
The area of the photograph will be,
