From the given options, the correct word that comes in the blank is variables.
Because l<span>ike terms are the terms that have the same variables with each variable raised to the same exponent. 
</span>Unlike terms are the opposite of like terms, as they do not have the same variables and exponents or powers.
like terms and unlike terms are used in algebra.
        
                    
             
        
        
        
Answer:
2.5cm^2
Step-by-step explanation:
so diameter is basically radius*2...to find radius(since area of circle is pi*r^2 we need to divide diameter by 2)
so 1.8/2=0.9
now,
pi*0.9^2
pi*0.81
2.5 cm^2
 
        
             
        
        
        
126 inches
(Ask me if you have any questions :) )
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
22 + 1 = -x + 4
23 = -x + 4
- 4        - 4
________
19 = −x

I am joyous to assist you anytime.