Solve the problem.Let 
represent the number of students present in a large class, where x represents the number of hours of study required weekly. What is the rate of change of the number of students in the class with respect to the number of hours of study?
A. 163
B. 13
C. -163
D. -13
Answer: D
Mathematics
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Solve.A boat moves at a rate of 120 mph in still water. It travels 210 miles upstream in the same time that it takes to travel 240 miles downstream. What is the speed of the current?
A. 8 mph B. 1 mph C. 7 mph D. 3 mph
Mathematics
Evaluate.
A. 1.052 x 1013 B. 1.052 x 1014 C. 1.052 x 1012 D. 2.104 x 1013
Mathematics
Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination.8w + 8x - 6y - 4z = -287w + 6x - 9y - 4z = -368w + 8x + 7y + 5z = 15-6w - 4x + 8y + 8z = 24
A. (-1, 4, -5, 2) B. (2, 3, -4, -2) C. (2, -3, 4, -1) D. No solution
Mathematics
Use the given graph of the polynomial function to estimate the x-intercepts.
A. -1, 0, 2 B. -3, -1, 0, 2 C. -3, -1, 2 D. -3, -1, 2
Mathematics