Solve. Graph the solution on a number line, and express it in interval notation.-1 ? 4 + 
x ? 6
A. -10 < x < 4, (-10, 4)
B. -5 ? x ? 2, [-5, 2]
C. -10 ? x ? 4, [-10, 4]
D. -5 < x < 2, (-5, 2)
Answer: C
Mathematics
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Use a graphing calculator to make a conjecture as to whether each equation is an identity.(sin x + cos x)2 = 1
A. Identity B. Not an identity
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Solve the inequality. Express your answer using interval notation. Graph the solution set.|x + 2| ? 0
A. (-?, 2) ? (2, ?)
B. (-?, -2) ? (-2, ?)
C. -2
D. (-?, ?)
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Factor by grouping.10x2 + 15x + 8x + 12
A. (5x - 4)(2x - 3) B. (10x + 4)(x + 3) C. (10x - 4)(x - 3) D. (5x + 4)(2x + 3)
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Use the vertex and intercepts to sketch the graph of the quadratic function.f(x) = 3 - x2 - 2x 
A. 
B. 
C. 
D. 
Mathematics