Answer: 
Step-by-step explanation:
The slope of the line is

Using the point (-2, 0) to substitute into point-slope form, we get the equation to be 
 
        
             
        
        
        
Add the like terms so (1)(-10i)
        
                    
             
        
        
        
Theorem of cosine:
a²=b²+c²-2bc(cos α)  ⇒cos α=-(a²-b²-c²) / 2bc
In this case:
a=15 cm
b=10 cm
c=5 cm
cos α=-(15²-10²-5²) / 2*10*5
cos α=-100 / 100
cos α=-1
A=arc cos -1=180º  This is impossible, because:
A+B+C=180º; then  B=C=0º  This is impossible for make a triangle  (B>0 and C>0 if we want to make a triangle).   
Therefore: it is not possible can make a triangle with side lengths of 5 cm, 10 cm and 15 cm. 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
your right on 105 cubic feet