1. Explain the most common types of sampling methods. If you needed to survey a city about a new road project, which sampling me
thod would you choose and explain the sample method. 
1 answer:
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Answer:
A. The coefficients of the sum are whole numbers and the sum is a polynomial.
Step-by-step explanation:
The approach to demonstrate the closure property for the sum consists in defining what a polynomial is and demonstrate that the sum of two polynomials with integer coefficients is equal to a polynomial with integer coefficients. We proceed to show the proof below:
1) ,
Given
2) Definition of addition
3) Definition of substraction/Associative and Commutative properties
4) Distributive property/Definition of substraction
5) Definition of addition/Result
Hence, the coefficients of the sum are whole numbers and the sum is a polynomial. The correct answer is A.
Well, if you look at the graph, when x = -1, y or f(x) = 4.
and when x = 2, y = 0.
and when x = 2, y = 0.