Find all the values of x (if any) where the tangent line to the graph of the given equation is horizontal. Round your answer to two decimal places.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: A
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Rationalize the numerator of the fraction.
A. 
B. 
C. 
D. 
Solve the problem.If a graph has 5 vertices and M is the number of vertices of odd degree, then M cannot be
A. 2. B. 4. C. 0. D. 3. E. none of these
Combine like terms whenever possible.7x2 + 15x - 18x2 + 9x
A. 11x2 - 24x B. -11x2 - 24x C. 11x2 + 24x D. -11x2 + 24x
The frequency of vibrations of a piano string varies directly as the square root of the tension on the string and inversely as the length of the string. The middle A string has a frequency of 430 vibrations per second. Find the frequency of a string that has 1.25 times as much tension and is 1.4 times as long. ?
A. 373.4 vibrations / sec B. 343.4 vibrations / sec C. 353.4 vibrations / sec D. 383.4 vibrations / sec E. 363.4 vibrations / sec