Answer:
c 
Step-by-step explanation:
The slope-intercept form is y=mx+b, where m is the slope and 
b is the y-intercept.
y=mx+b
m=−3
 b=0
y=-3x+0
 
        
                    
             
        
        
        
the answer is 14 cm.i have to write more to post this answer.
 
        
             
        
        
        
roots of a polynomial are (x-c1)(x-c2)(x-c3) .......(x-cn). Basically, plug every root you have into a (x-__) and then multiply them all together. Just be careful of signs. If your root is positive, it is written as (x-__). If your root is negative, it is written (x+__)
<span>I got x^5-5x^4+5x^3+5x^2-6x</span>
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<span>Hope this helps</span>
 
        
             
        
        
        
A'(5.5, -4.2), B'(7.5, -9.2), C'(3.5, -3.2)
hope it helped