Solve the equation.9k2 - 81 = 0
A. 
, 0
B. 9, 0
C. 
, - 3
D. 3, - 3
Answer: D
Mathematics
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At what points is the given function continuous?f(x, y) = tan (x + y)
A. All (x, y) ? (0, 0)
B. All (x, y) ? 
C. All (x, y)
D. All (x, y) such that x + y ? 
, where n is an integer
Mathematics
Solve the problem.Let u = 
, v = 
. Find u + v.
A. 
B. 
C. 
D. 
Mathematics
Use the range rule of thumb to approximate the standard deviation.The maximum value of a distribution is 12.6 and the minimum value is 4.3. Round results to the nearest tenth.
A. 7.1 B. 2.1 C. -0.9 D. 10.7
Mathematics
Find the partial fraction decomposition for the rational expression.
A. 1 + 
+ 
B. 1 + 
+ 
C. 
+ 
D. 
+ 
Mathematics