The slope of line A is m= 1/3
        
                    
             
        
        
        
3x^3=0
the only possible answer is x=0
factor
3(x^3)=0
x^3=0
x=0
C
        
                    
             
        
        
        
Answer:
1: 7x+19=40
2: 19+7x=40
Step-by-step explanation:
 
        
             
        
        
        
Answer:
I. First number, a = 40. 
II. Second number, b = 50. 
III. Third number, c = 120.
Step-by-step explanation:
Let the three numbers be a, b and c respectively. 
Given the following data;
Translating the word problem into an algebraic equation, we have;
a + b + c = 210
b = a + 10
c = 3a
Substituting the value of b and c into the equation, we have;
a + a + 10 + 3a = 210
5a + 10 = 210
5a = 210 - 10
5a = 200
a = 200/5
<em>a = 40</em>
To find the value of b;
b = a + 10 
b = 40 + 10
<em>b = 50</em>
To find c
c = 3a 
c = 3*40
<em>c = 120</em>