Factor by grouping.20x4 + 15x2 - 8x2 - 6
A. (5x2 + 2)(4x2 - 3)
B. (5x2 - 2)(4x2 + 3)
C. (5x4 - 2)(4x + 3)
D. (20x2 + 2)(x2 - 3)
Answer: B
Mathematics
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(in second quadrant).
A. - 
B. 
C. 
D. - 
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Determine whether the given function satisfies a Laplace equation.f(x, y, z) = cos (7x) sin (7y) e(
z)
A. Yes B. No
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Solve the problem.Of the fifty states in the United States, 12 have at least one mountain higher than 12,000 feet. What fraction of states have at least one mountain higher than 12,000 feet? Write your answer in lowest terms.
A. 
B. 
C. 
D. 
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Solve the inequality. Express your answer using interval notation. Graph the solution set.-2x - 6 ? -3x - 1
A. (-?, 5)
B. [5, ?)
C. [-7, ?)
D. (-?, 5]
Mathematics