Answer:
an expression of more than two algebraic terms, especially the sum of several terms that contain different powers of the same variable(s).
 
        
             
        
        
        
Answer:
3 and 5 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Following are the solution to the question:
Step-by-step explanation:

z-score for  will be:
 will be:
z score for will be:

 using excel method to calculate the value.
 using excel method to calculate the value. 
 
        
             
        
        
        
Answer:
20
Step-by-step explanation:
the number line is patterned in twos, so the dot will be at 20, since its 4 spaces away from 12
 
        
                    
             
        
        
        
Answer:
Integers, whole numbers and polynomials are sets of closed under multiplication.
Only Irrational numbers are not the sets of closed under multiplication.                   
Step-by-step explanation:
To find : Which of the following sets are closed under multiplication? 
1. Integers  
Yes, integers is a sets of closed under multiplication as if you multiply an integer by an integer, you will always get another  integer.
Example -  is an integer
 is an integer
2. Irrational numbers
No, irrationals are not closed under multiplication.
Example -  is a rational number
 is a rational number
3. Whole numbers
Yes, whole numbers is a sets of closed under multiplication as if you multiply a whole number by a whole number, you will always get another  whole number.
Example -  is a whole number
 is a whole number
4. Polynomials 
Yes, polynomial is sets of closed under multiplication as if you multiply the variables' exponents are added, and the exponents in polynomials are whole numbers so the new exponents will be whole numbers. 
Example -  is a polynomial.
 is a polynomial.