Solve the inequality.x2 - 49 > 0
A. (-?, -49) or (49, ?)
B. (-7, 7)
C. (-49, 49)
D. (-?, -7) or (7, ?)
Answer: D
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+ 3 = 5 
= 2 (
)2 = 22 x = 4What would have happened if the radical had not been isolated before the principle of squaring was used? Could the equation still have been solved? Why or why not?
What will be an ideal response?
Provide an appropriate response.Is f continuous at x = 4? 
A. Yes B. No
A survey showed that students had these preferences for instructional materials. Use the graph to answer the question.
About how many students would you expect to prefer TV in a school of 800 students?
A. About 96 students B. About 160 students C. About 144 students D. About 12 students
Simplify. Write your answer in the form a + bi, where a and b are real numbers.(12 + 9i) - (1 + 2i)
A. 11 + 7i B. 13 + 11i C. 13 - 7i D. -13 - 11i