4) because 10 x 10 is 100
        
             
        
        
        
Hello, The answer to this question is, A. $12.48
        
                    
             
        
        
        
Answer:
   -6/7
Step-by-step explanation:
The slope of DE is ...
  (change in y)/(change in x) = (y2 -y1)/(x2 -x1) = (-3-4)/(1-7) = -7/-6 = 7/6
The slope of the line perpendicular to DE is the negative reciprocal of this:
   perpendicular slope = -1/slope = -1/(7/6) = -6/7
___
 
        
             
        
        
        
Answer:
8
Step-by-step explanation:
To find the answer to these problems you can work backwards
12-4=8