Solve the inequality. Graph the solution set, and state the solution set in interval notation.|x| ? 4
A. [-4, 4]
B. [4, ?)
C. (-?, -4] ? [4, ?)
D. (-?, -4) ? (4, ?)
Answer: C
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Solve the problem.Estimate the area of the surface generated by revolving the curve y = cos 2x, 0 ? x ? ?/4 about the x-axis.Use the Trapezoidal Rule with n = 6.
A. 5.108 B. 4.652 C. 7.091 D. 4.606
Sketch the graph of the parabola.f(x) = (x + 1)2
A. 
B. 
C. 
D. 
Solve the equation.-42 = -7 - 7x
A. 5 B. -28 C. 13 D. -24
Write a system of equations to describe the problem situation. It is not necessary to solve the problem. Martina has 58 nickels and dimes. She has $3.10 altogether. She has x nickels and y dimes.
A) y = 58 - x, 0.05x + 0.10y = 3.10 B) x + y = 58, 0.05y + 0.10x = 3.10 C) x + y = 58, 0.25y + 0.10y = 3.10 D) x - y = 58, 0.05x + 0.10y = 3.10 E) x – y = 58, 0.05y + 0.25x = 3.10