Perform the following operation.
?
Subtract x - 7 from 2x2 - 9x + 6.
?
A. 
B. 
C. 
D. 
E. 
Answer: D
Mathematics
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Find the length and direction (when defined) of u × v.u = 4i + 3j - 4k, v = -8i - 6j + 8k
A. 
; 
(-4i - 3j + 4k)
B. 
; 
(-4i - 3j + 4k)
C. 0; -4i- 3j + 4k
D. 0; no direction
Mathematics
State the domain of the given function.f(x) = 
A. All real numbers except -8 B. All real numbers C. All real numbers except 8 D. All real numbers x > 8
Mathematics
Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = 2cos (?x), y = 2, x = -0.5, x = 0.5
A. 8?
B. 4?
C. 
?
D. 2?
Mathematics
Find the center of mass of the thin rod with the given density function.Find the center of mass of a thin rod that lies along the semicircle y = 
if the density of the rod is 
A. 
= 0, 
= 
?
B. 
= 0, 
= 
?
C. 
= 
?, 
= 
?
D. 
= 
?, 
= 
?
Mathematics