Solve the inequality and write the solution set using interval notation; then graph the solution set on a number line. (a + 1)(a - 4)(a - 7) > 0
A. (-1, 4) ? (7, ?)
B. (7, ?)
C. (-?, 4)
D. (-?, -1) ? (4, 7)
Answer: A
Mathematics
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A. 
B. 
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D. 
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