The line  is already written in the
 is already written in the  form. This means that
 form. This means that  is the slope. If two lines are perpendicular, their slopes are the anti-inverse of each other, i.e. their product is -1.
 is the slope. If two lines are perpendicular, their slopes are the anti-inverse of each other, i.e. their product is -1.
So, our perpendicular line has a slope of 
Finally, we want a line passing through (1,1) with slope  :
:

 
        
             
        
        
        
If you would like to know how many tortes are left, you can calculate this using the following steps:
five chocolate tortes - 2 5/16 tortes = 5 - 2 5/16 = 5 - 37/16 =  80/16 - 37/16 = 43/16 = 2 11/16
The correct result would be D. 2 11/16.
        
                    
             
        
        
        
Answer: 6
Steps:
7 + 11 + 0 = 18
18/3 = 6
        
                    
             
        
        
        
So you express fraction. 
15 x (1/3)^ 3=15/27=5/9