Solve the problem.Find the common difference of an arithmetic sequence if the first term is 3 and the 8th term is 31.
A. -28
B. 28
C. -4
D. 4
Answer: D
Mathematics
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Solve the equation.4x = 
A. {-4}
B. 
C. 
D. {4}
Mathematics
Write the expression in terms of sines and/or cosines, and then simplify.sec2 x(1 + cos2 x)
A. 
B. sin x
C. 
D. 
Mathematics
Use Cramer's rule to solve the system of linear equations.-5x + 9y = 45 3x - 2y = -10
A. (0, 6) B. (-1, 6) C. (0, 5) D. No solution
Mathematics
Graph the function defined by a radical expression. Give the domain and range.
= - 
A. Domain: (-?, ?);
Range: (-?, -4]
B. Domain: (-?, -4];
Range: (-?, ?)
C. Domain: (-?, ?);
Range: [4, ?)
D. Domain: [-4, 4];
Range: [-4, 0]
Mathematics