Factor the trinomial completely.x4 + 4x2 + 4
A. (x2 + 2)2
B. (x2 + 2)(x2 - 2)
C. (x2 + 4)(x2 - 4)
D. (x2 - 2)2
Answer: A
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Solve the problem.Suppose 
is a mathematical model for actual time as a function of estimated time, where f(x) represents actual time (in minutes), x represents estimated time (in minutes), and m and b are constants. If 
and b = -3, find f(x) when x is 60 minutes.
A. 67.8 min B. 153 min C. 159 min D. 52.2 min
Solve the system of equations using the inverse of the coefficient matrix.
A. x = -1, y = 0, z = 1, w = 1 B. x = -3, y = -2, z = -3, w = 1 C. x = -3, y = 2, z = 3, w = -1 D. The system is inconsistent.
Graph.f(x) = -3(x + 3)2 - 4
A. 
B. 
C. 
D. 
If a baseball pitcher has pitched innings and has allowed 15 runs, find his ERA. [Remember the ERA (Earned Run Average) equals the number of earned runs allowed in 9 innings.]
What will be an ideal response?