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
Answer: C
Mathematics
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Use a graphing calculator to determine which expression completes the identity.The expression 
is to be the left hand side of an equation that is an identity. Which one of the following four expressions can be used as the right hand side of the equation to complete the identity?
A. cos x + 1 B. tan x - sec x C. sin x + cos x D. cot x + sin2x
Mathematics
Multiply.
?
?
A. -0.01831 B. -18,310 C. -1,831,000 D. -183,100 E. -1,831
Mathematics
Evaluate the rational expression for the given value of the variable.
for x = -9
A. 
B. 0
C. - 
D. Undefined
Mathematics
Solve the equation and check.
x = __________
Fill in the blank(s) with the appropriate word(s).
Mathematics