Find all values of the variable for which the rational expression is undefined.
A. -7, 7
B. 0
C. -6, 4
D. -4, 6
Answer: C
Mathematics
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Prove that the equation is an identity.cos (x + y) cos (x - y) = cos2 x cos2 y - sin2 x sin2 y
What will be an ideal response?
Mathematics
Rationalize the denominator. Assume that all variables represent positive real numbers and that the denominator is not zero.
A. 
B. 
C. 
D. 
Mathematics
Find the vertices of the hyperbola.4(x - 2)2 - 25(y - 4)2 = 100
A. (2, 6) and (2, 2) B. (-2, -2) and (-2, -6) C. (-3, 4) and (7, 4) D. (-7, -4) and (3, -4)
Mathematics
Evaluate the expression.
A. -5 B. 4 C. -4 D. 5
Mathematics