Perform the indicated operations.(-6x2y - xy) + (8x2y + 5xy)
A. 14x2y + 6xy
B. 2x2y + 6xy
C. 14x2y + 4xy
D. 2x2y + 4xy
Answer: D
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Construct a stem and leaf display for given data.The instructor of an introductory mathematics class has recorded the number of students attending his class in the last 4 weeks. Below are his recordings.
A. 
B. 
C. 
D. 
The Richter scale converts seismographic readings into numbers for measuring the magnitude of an earthquake according to this function M(x) = log 
, where x0 = 10-3.What is the magnitude of an earthquake whose seismographic reading is 0.94 millimeters at a distance of 100 kilometers from its epicenter? Round the answer to four decimal places.
A. -3.0269 B. -0.0269 C. 0.9731 D. 2.9731
Multiply and simplify. Assume variables do not cause any denominators to equal 0.
? 
A. 
B. 
C. 
D. 
Solve. If necessary, round percents to the nearest tenth, dollar amounts to the nearest cent, and all other numbers to the nearest whole.The enrollment at a local college increased 15% over last year's enrollment of 1,500. Find the current enrollment.
A. 3,750 students B. 1,515 students C. 225 students D. 1,725 students