Solve the problem.If half a number is added to 9, the result is greater than or equal to -4. Find all such numbers.
A. x ? -26
B. x ? 5
C. x > -26
D. x ? -36
Answer: A
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Use the decibel scale to answer the question.How many times as loud as the softest audible sound is the sound of threshold of pain for human ear (90 decibels)?
A. 103 B. 1090 C. 1018 D. 109
Fill in the blank with the correct inequality symbol.If - 3x < 12, then x 
-4.
A. < B. ? C. > D. ?
Use a graphing calculator to solve the equation.2x2 = -9x - 9
A. 3, 
B. - 
, -3
C. -3, -6
D. 3, - 
Solve the problem.ABC phone company charges $25 per month plus 7¢ per minute of phone calls. XYZ phone company charges $16 per month plus 10¢ per minute of phone calls. How many minutes of phone calls in a month make XYZ phone company the better deal?
A. Less than 300 minutes B. Less than 30 minutes C. More than 300 minutes D. More than 30 minutes