Solve the problem.The sum of twice a number and 15 less than the number is the same as the difference between -23 and the number. What is the number?
A. -4
B. -2
C. -3
D. -1
Answer: B
Mathematics
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Find the perimeter of the figure.
A. The perimeter is 380 yards. B. The perimeter is 309 yards. C. The perimeter is 456 yards. D. The perimeter is 400 yards.
Mathematics
Answer the question.Suppose that an > 0 and bn > 0 for all n ? N (N an integer). If 
= ?, what can you conclude about the convergence of 
?
A. 
diverges if 
diverges, and 
converges if 
converges
B. The convergence of an cannot be determined.
C. 
converges if 
converges
D. 
diverges if 
diverges
Mathematics
?Use the matrix capabilities of a graphing utility to solve the following system of linear equations:
?
?
A. ?
?
B. ?
C. ?
D. ?
E. ?
Mathematics
Determine whether the planes are parallel, orthogonal, or neither. 5x- 4y + z = -2 3x + 4y + z = -5
A. parallel B. orthogonal C. neither
Mathematics