Find the indicated decile or percentile.The test scores of 19 students are listed below. Find the sixth decile, D6 .
A. 65
B. 74
C. 69
D. 70
Answer: D
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Round the numbers so that there is only one non-zero digit, and estimate the answer. Then perform the indicated operation to find the exact answer.13.85 + 31.9 + 9.2
A. estimate: 49; exact: 54.95 B. estimate: 49; exact: 44.95 C. estimate: 50; exact: 55.95 D. estimate: 49; exact: 53.95
Find any restricted values for the given rational expression.
A. x = 1, x = 
, x = 15, x = 0
B. x = -15, x = 1, x = 0
C. x = 1, x = 
, x = 15
D. x = 1, x = 15, x = 0
Solve the system of equations.
A. x = 0, y = 0, z = 4; (0, 0, 4) B. x = 0, y = 4, z = -4; (0, 4, -4) C. x = 0, y = 4, z = 0; (0, 4, 0) D. inconsistent
Solve.A man rode a bicycle for 12 miles and then hiked an additional 8 miles. The total time for the trip was 5 hours. If his speed when he was biking was 10 mph faster than his speed when he was hiking, then at what speed was he biking?
A. 11.5 mph B. 12 mph C. 13 mph D. 14.5 mph