Evaluate the expression for the given value or values.xy, for x = -8, y = -7
A. 
B. -56
C. 15
D. 56
Answer: D
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Find the mean of the list of data.42, 64, 48, 38, 84, 53, 98, 109
A. 66 B. 65 C. 68 D. 67 E. 69
Solve the problem.A runner is competing in an 8-mile race. As the runner passes each miles marker (M), a steward records the time elapsed in minutes (t) since the beginning of the race, as shown in the table. What is the runner's average speed over the first 4 miles? Round your answer to four decimal places.
A. 0.0649 miles/min B. 13.7552 miles/min C. 0.0862 miles/min D. 0.0727 miles/min
Estimate the value of the quantity.The velocity of a projectile fired straight into the air is given every half second. Use right endpoints to estimate the distance the projectile travelled in four seconds.
A. 459.8 m B. 958.8 m C. 919.6 m D. 479.4 m
Divide.
÷ 
A. 
B. 
C. 
D. 