Simplify the rational expression. If the expression is already in simplest form, state this as your answer.
A. 
B. 
C. 
D. simplest form
Answer: B
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Write the conjugate 
of the complex number z. Then find z
.z = -9 - i
A. 
= -9 + i, z
= 81
B. 
= -9 + i, z
= -80
C. 
= -9 + i, z
= 82
D. 
= -9 + i, z
= -9
Rewrite using the stated property.Commutative property; 21 ? 
A. 16 ? 
B. 
? 16
C. 21 ? 
D. 
? 21
Using the derivative of f(x) given below, determine the intervals on which f(x) is increasing or decreasing.f'(x) = (x + 3)2 e-x
A. Never increasing; decreasing on (-?, -3) ? (-3, ?) B. Decreasing on (-?, -3); increasing on (-3, ?) C. Never decreasing; increasing on (-?, -3) ? (-3, ?) D. Never decreasing; increasing on (-?, 3) ? (3, ?)
Use a graphing calculator to estimate the solution of the equation to two decimal places.2.5(1.9x + 7.9) - 9.25(1.7x - 3.27) = 0
A. {0.42} B. {2.44} C. {2.37} D. {4.56}