Solve by completing the square.x2 + 8x = 5
A. 4 + 
B. -4 ± 2
C. -4 ± 
D. -1 ± 
Answer: C
Mathematics
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Perform the indicated operations graphically.(-4 + 4j ) + ( 2 + 4j )
A. 
a = -4 + 4j
b = 2 + 4j
c = (-4 + 4j ) + ( 2 + 4j )
B. 
a = -4 - 4j
b = 2 + 4j
c = (-4 + 4j ) + ( 2 + 4j )
C. 
a = -4 + 4j
b = 2 + 4j
c = (-4 + 4j ) + ( 2 + 4j )
D. 
a = -4 + 4j
b = 2 + 4j
c = (-4 + 4j ) + ( 2 + 4j )
Mathematics
Eliminate the parameter t. Find a rectangular equation for the plane curve defined by the parametric equations.x = 5 tan t, y = 4 sec t; 0 ? t ? 2?
A. 
- 
= 1; -? < x < ?
B. 
+ 
= 1; -? < x < ?
C. y = x2 - 9; -3 ? x ? 3
D. y = 4
; -? < x < ?
Mathematics
Find the domain of the function.f(x) = 6x - 1
A. [1, ?) B. (-?, ?) C. (0, ?) D. (-?, 0) ? (0, ?)
Mathematics
Simplify the expression. Assume that all variables are positive.
A. 
B. 0
C. 
D. 
Mathematics