To evaluate when plugging in numerical values for variables, simply put the numerical values in the place of the corresponding variables:


 
        
                    
             
        
        
        
Answer:
7
Step-by-step explanation:
sqrt(49)
What number times itself = 49
7*7 = 49
and 
-7*-7 = 49
Given the choices  choose 7
 
        
                    
             
        
        
        
Answer:
a) -10 b) 7
Step-by-step explanation:
a) 2(x+ 3) = x - 4
 2x + 6 = x - 4
 2x - x = -6 - 4
 x = -10
b) 4(5x - 2) = 2(9x + 3)
 20x - 8 = 18x + 6
 20x - 18x = 6 + 8
 2x = 14
 x = 14/2 
 x = 7
 
        
                    
             
        
        
        
Answer:
There are no solutions to the inequality.
Step-by-step explanation:
|x - 3| < x – 3
1. Separate the inequality into two separate ones.
(1) x – 3 < x – 3
(2) x – 3 < -(x – 3)  
2. Solve each equation separately
(a) Equation (1)

(b) Equation (2)

For example, if x = 0, we get  
|0 - 3| < 0 - 3 or
3 < -3
 
        
             
        
        
        
Answer:
100
Step-by-step explanation: