Answer:
4 units 
Step-by-step explanation:
CAB and EAD are similar triangles with sides in the ratio 2:1
ED = ½ AB
½(8)
4
 
        
                    
             
        
        
        
Inverse operations are operations that undo each other. 
In this case, 10 + 2 = 12, and 12 - 2 = 10 
A multiplication example could be 4 x 2 = 8, and 8 ÷ 2 = 4
Answer is inverse operations. 
        
                    
             
        
        
        
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<h3><u>solution</u><u>:</u></h3>
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Step-by-step explanation:
the slope of a line or linear equation is always the factor of the driving variable.
usually in the form of
y = ax + b
x is the variable, and a the slope.
but in our case the variable is called "n".
it does not matter, the same principle applies.
the slope is the factor of n : 1050.
and as the slope is always the ratio y/x, we are looking for a fraction form, and that would be 1050/1.
so, the third answer is correct.