Find the real or imaginary solutions by completing the square.x2 + 4x + 53 = 0
A. 
B. {5, -9}
C. {-2 ± 7i}
D. {2 ± 7i}
Answer: C
Mathematics
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Solve the problem.Tom Quig traveled 220 miles east of St. Louis. For most of the trip he averaged 60 mph, but for one period of time he was slowed to 10 mph due to a major accident. If the total time of travel was 7 hours, how many miles did he drive at the reduced speed?
A. 40 miles B. 35 miles C. 60 miles D. 50 miles
Mathematics
Find the standard deviation. Round to the nearest tenth.3, 3, 11, 9, 17, 15, 14, 10, 14
A. 1.3 B. 5.4 C. 4.7 D. 5.0
Mathematics
Solve for x: 
. Round to 3 decimal places.
A. -20.606 B. 9.803 C. 20.606 D. -3.268 E. 15.777
Mathematics
For the compound inequality, give the solution set in both interval and graph forms. 1 - 5x ? 11 or 7x + 3 ? -25
A. (-?,?)
B. [-2, ?)
C. [-4, -2]
D. [-4, ?)
Mathematics