Answer:
C. 
x	-7	-5	-1	1
y	33	31	39	33
Step-by-step explanation:
think so
 
        
             
        
        
        
Refer to the attached image. Since one vertex is the origin and the other two lay on the coordinate axes, the triangle is a right triangle. This means that, if we consider AB to the be base, AC is his height, and vice versa.
Anyway, it means that the area is given by

Since AB is a horizontal segment and AC is a vertical segment, their length is given by the absolute difference of the non-constant coordinate: points A and B share the same x coordinate, so we subtract the y coordinates:

The opposite goes for AC: points A and C share the same y coordinate, so we subtract the x coordinates:

So, the area is 

 
        
             
        
        
        
2km=2 kilometer
kilo=1000 so 2 km=2000m
25m
2500cm
cm=centimeter=1/100 of a meter
so 
2500cm=25m
mm=milimeter=1/1000 meter
so 
3000mm=3m
so the longets is obviously 2000m or 2km
        
                    
             
        
        
        
The answer is -51, hope this helps
        
                    
             
        
        
        
Answer:
 The first should be (x+6, y-(-10).
The others, not sure but you have to plug them in.