Solve the equation by completing the square.x2 + 4x + 40 = 0
A. {4, -8}
B. {-2 ± 6i}
C. {-2 ± 36i}
D. {-2 + 6i}
Answer: B
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
Provide an appropriate response.Is 9y in the expression 9y - 11z a factor or a term?
A. factor B. term
Mathematics
Find the area.Each square represents one square unit.
A. 25 square units B. 23 square units C. 21 square units D. 22 square units
Mathematics
Evaluate if possible.
A. 0.001 B. 0.01 C. 0.0001 D. 0.1
Mathematics