Perform the indicated operation and, if possible, simplify. Assume that all variables represent positive real numbers. 
A. 2x
B. x
C. 2x
D. 2x
Answer: D
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Provide an appropriate response. Multiply and simplify: (2 + 3i)(5 - i)
A. 10 + 10i B. 7 + 13i C. 13 + 13i D. 10 + 16i
Solve using Cramer's rule, if possible. If it is not possible, state whether the system is inconsistent or has infinitely many solutions.
A. (6, 1, 6) B. (5, -6, -1) C. (6, 4, 1) D. (5, 6, 1)
Solve the problem.An object's altitude, in meters, is given by the polynomial h + vt - 4.9t2, where h is the height in meters from which the launch occurs, v is the initial upward speed in meters per second, and t is the number of seconds for which the rocket is airborne. A pebble is shot upward from the top of a building 171 meters tall. If the initial speed is 35 meters per second, how high above the ground will the pebble be after 3 seconds? Round results to the nearest tenth of a meter.
A. 320.1 meters B. 503.9 meters C. 261.3 meters D. 231.9 meters
Divide. Write a mixed numeral for the answer.
A. 46
B. 47
C. 46
D. 47