B. -3
The value of a for given polynomial is -3
<h3>
Explanation:</h3>
<em>Factor theorem for polynomials,</em>
<u><em>If (x-c) is a factor of polynomial f(x), then f(c)=0</em></u>
Given: x+a is a factor of polynomial 
Let 
By Factor theorem, since x+a is a factor of f(x),
![(x+a)=[x-(-a)]\\So,\ f(-a)=0](https://tex.z-dn.net/?f=%28x%2Ba%29%3D%5Bx-%28-a%29%5D%5C%5CSo%2C%5C%20f%28-a%29%3D0)
Substituting 
in f(x)=0, we get
![f(x) = 4x^3-13x^2-ax = 0\\f(-a)= [4(-a)^3]-[13(-a)^2]-[a(-a)] = 0\\(-4a^3-13a^2+a^2)=0\\(-4a^3-12a^2)=0\\-4a^3=12a^2\\\frac{a^3}{a^2} =\frac{12}{-4} \\\\a=(-3)](https://tex.z-dn.net/?f=f%28x%29%20%3D%204x%5E3-13x%5E2-ax%20%3D%200%5C%5Cf%28-a%29%3D%20%5B4%28-a%29%5E3%5D-%5B13%28-a%29%5E2%5D-%5Ba%28-a%29%5D%20%3D%200%5C%5C%28-4a%5E3-13a%5E2%2Ba%5E2%29%3D0%5C%5C%28-4a%5E3-12a%5E2%29%3D0%5C%5C-4a%5E3%3D12a%5E2%5C%5C%5Cfrac%7Ba%5E3%7D%7Ba%5E2%7D%20%3D%5Cfrac%7B12%7D%7B-4%7D%20%5C%5C%5C%5Ca%3D%28-3%29)
Therefore, value of a is (-3)
The above text illustrates in a lively way what people in the 19th century believed about the revival of the Olympic Games. However, it does not reveal anything about the first attempts of Greeks to revive the Olympic Games, long before the birth of the Baron de Coubertin. Later, in 1896, the 1st International Olympic Games took place in Athens. Many people contributed to the realization of the Olympic Games. In the 19th century the social structure of the national states was ideal for the gradual acceptance of the Olympic Idea in a new -national- framework. The symbolism of the Olympic Games reveals to us today the process through which people learned the new notions of their era.
Answer:
B. Ukrainians
Explanation:
In Ukraine, you can still see the adverse effects, politically, of this. Many people in Ukraine still don't trust the Russian government.
Image result for Which of the following countries was never a member of the League of Nations
The Soviet Union was the only country to be expelled by the League (in 1939, following its invasion of Finland). Despite formulating the concept and signing the Covenant, the United States never joined the League of Nations.
Member: Ecuador; Soviet Union
<span>7. I think that the best answer is this one: B. The Native American population had been greatly reduced through war and disease. A great part of the indigenous population has died as a result of the disease, and while they were also made to work for the settlers, the Spaniards wanted to have even more laborers. </span>
