Answer:
see picture with work shown
 
        
             
        
        
        
Answer:
Answer is 9.
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Answer:
1) D. 
2) E. The coefficient of  is -16.
 is -16.
Step-by-step explanation:
1) A polynomial is an algebraic expression of the form  , where
, where  is the grade of the polynomial. In this case, the only equation that satisfies this definition is:
 is the grade of the polynomial. In this case, the only equation that satisfies this definition is: 

Correct answer: D
2) Let  , we proceed to expand the expression by algebraic means:
, we proceed to expand the expression by algebraic means:


We see that coefficients for  and
 and  are -16 and 0, respectively. Hence, the incorrect answer is E.
 are -16 and 0, respectively. Hence, the incorrect answer is E.
 
        
             
        
        
        
Answer:
x+y=0
Step-by-step explanation:
slope m of given equations is 
(-5+1)÷(3+1)
=-1
then the equations of this line is
y-(-1)=m(x-1)
or, y+1=-1(x-1)
or, y+1= -x+1
or, x+y=0
x+y=0 is required equation of line.