Answer:
A Variable
Step-by-step explanation:
Variables are used to mark an unknown value. Common math problems ask you to solve for it. 
For example in 5x+23=45, 'x' is the variable. 
A constant is a number without a variable. 
<em>Brainilest Appreciated. </em>
 
        
             
        
        
        
Answer:
slope = -3
Step-by-step explanation:
This equation isthe form: y = mx + c
y= -3x-2
so, m = -3
 
        
                    
             
        
        
        
154cm squared this is the only right answer
        
             
        
        
        
You multiply the number by itself however many times it says for example 2 to the second power 2x2 is 4