Letters used to represent values or unknown quantities that
can change or vary. One example of an algebraic expression
is 3x – 4. Notice the variable,
        
             
        
        
        
Answer:
10 I think
Step-by-step explanation:
well we add it all together 2+1+3+4
 
        
                    
             
        
        
        
X= -b over 2a = --6 over 2×1=3
y=3²-6(3)-7=-16 
vertex is (3,-16)
axis of symmetry is 3
        
                    
             
        
        
        
Answer:
negative
Step-by-step explanation:
a positive divided by a negative is a negative 
 
        
             
        
        
        
Answer:
31
Step-by-step explanation:
An entire amount is 100% of the amount.
50% is half of 100%, so 50% means the same as half.
Half of 62 is the same as 62/2 = 31
Answer: 31