Answer:
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Answer: Mongols successfully spread their culture and religious beliefs along overland trade routes.
Explanation:
Under Genghis Khan and his descendants, the Mongols conquered a significant part of Asia and some of Europe to form the largest contiguous land empire in history. This meant that they took over a significant number of nations and trade routes.
These trade routes prospered under the Mongols as they gave trade and merchants special status. The security on these roads and the connections made to the various Mongol dominions enabled the Mongols to successfully spread their culture such that quite a number nations inherited their way of life.
Answer: D. To determine appropriate course placement for students wishing to enroll in college
Answer:

You can solve this equation by applying the zero product rule.
Firstly, you equate the expression to 0 in order to combine both fractions into one. As shown in Step 2, you find the LCM of both fractions and multiply accordingly. In this case, the LCM of both fractions is 3n(3n+1). Hence you cross multiply.
Next, you eliminate the denominator in order to solve the equation more conveniently. As you multiply the fraction by the denominator on the LHS, you do that to the RHS as well to maintain balance. 0×3n(3n+1)=0, hence Step 3.
Then, you expand the parentheses using the distributive law of multiplication, resulting in a quadratic equation.
Lastly, you solve the quadratic equation.
The answer is n=-3
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A company with a natural monopoly might be the only provider or product or service in an industry or geographic location. Natural monopolies are allowed when a single company can supply a product or service at a lower cost than any potential competitor but are often heavily regulated to protect consumers.