Multiply.(4x2 - 9x)(4x2 + 9x)
A. 4x4 - 9x2
B. 16x4 - 81x2
C. 16x4 - 72x3 - 81x2
D. 16x4 + 72x3 - 81x2
Answer: B
Mathematics
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Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. -7x - 7y + 9z = 5 B. x + y + z = 5 C. -7x - 7y + 9z = 1 D. x + y + z = 1
Mathematics
Simplify.-|-2|
A. 2 B. -2 C. 1 D. -1
Mathematics
Find f(x) and g(x) such that h(x) = (f ? g)(x). Answers may vary.h(x) = 
A. f(x) = 
, g(x) = 5
B. f(x) = 
, g(x) = 6x + 10
C. f(x) = 5, g(x) = 
D. f(x) = 
, g(x) = 6x + 10
Mathematics
Simplify the rational expression. If the expression is already in simplest form, state this as your answer.
A. 
B. 
C. 
D. 
Mathematics