Simplify.
A. 3
B. 
C. 
D. 3 - x2
Answer: C
Mathematics
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Find the center of mass of a thin plate covering the given region with the given density function.The region between the x-axis and the curve y = 
, 1 ? x ? 2, with density ?(x) = 
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Mathematics
Rationalize the denominator. Assume that all variables represent nonnegative numbers and that the denominator is not zero.
A. 
B. 
C. 
D. 
Mathematics
Use substitution to factor the polynomial.10x4 + 21x2 + 9
A. (10x2 + 3)(x2 + 3) B. (2x2 + 1)(5x2 + 9) C. (2x2 + 3)(5x2 + 3) D. (5x2 - 3)(2x2 - 3)
Mathematics
Simplify.(6
+ 2
)(4
+ 7
)
A. 24
+ 14
B. 196 + 50
C. 140 + 50
D. 24
+ 14
+ 50
Mathematics