Using substitution method 
 Your answer is 
X=1
Y=1
        
                    
             
        
        
        
The area of the garden needs to be greater than 400 square feet but less than 600 square feet
        
                    
             
        
        
        
0.10×16,050+0.28×(134,899−16,050)
=34,882.72
        
                    
             
        
        
        
Good job you got it right! But others won’t be able to find it because you have a basic writing for it. Next time put the actual equations on so others can find it!