Simplify.
-2
A. 
B. 
C. - 
D. - 
Answer: B
Mathematics
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Solve the problem.Find the vector from the origin to the center of mass of a thin triangular plate (uniform density) whose vertices are A(6, 1, 5), B(5, 3, 9), and C(2, 5, 9).
A. 
i - 2j - 
k
B. 
i - 1j - 
k
C. 
i + 3j + 
k
D. 
i - 3j - 
k
Mathematics
Evaluate.-5x + 4 for x = -2
A. -6 B. 14 C. -14 D. 6
Mathematics
Solve and graph. Write the solution set in set-builder and interval notation.
? 4
A. {a
a > 12}; (12, ?)
B. {a
a ? 12}; (-?, 12]
C. {a
a ? 12}; [12, ?)
D. {a
a < 12}; (-?, 12)
Mathematics
Provide an appropriate response.Prove that C(n, n - 25) = C(n, 25), with n a positive integer greater 
.
What will be an ideal response?
Mathematics