Determine the principal value without using a calculator.- 
A. -12
B. -5
C. Not a real number
D. 5
Answer: B
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Which of the following is not true about the congruent angles in triangles, created by bisecting a parallelogram??
A. ?Angle x and angle y are congruent because of the Opposite Interior Postulate. B. ?Opposite sides of a parallelogram are congruent. C. ?The two triangles are congruent. D. ?The two triangles are congruent because of the SSS Postulate. E. ?The two triangle are congruent because of the SAS Postulate. F. ?None of the above.
Find the indicted product and simplify if possible.The amount of material required to make a spherical shell is given by 
(R - r)(R2 + Rr + r2).
A. 
R3 + 
R2r + 
Rr2 + 
r3
B. 
R3 - 
R2r + 
Rr2 - 
r3
C. 
R3 - 
r3
D. 
R3 - r3
Express the terminating decimal number as a quotient of two integers.12.75
A. 12
B. 
C. 
D. 
Find the particular solution to the given differential equation that satisfies the given conditions.dy + 3 dx = x2 dy + 2xy dx; x = 2 when y = 2
A. y = x2y - 3x B. y = x2y - 3x + c C. y = x2y + 3x D. y = xy2 - 3x