Perform the indicated calculation.Calculate a21 + a22a12 for the matrix A = 
.
A. 285
B. -13
C. -48
D. -43
Answer: B
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Provide an appropriate response.Suppose that an > 0 and bn > 0 for all n ? N (N an integer). If 
= ?, what can you conclude about the convergence of 
?
A. 
converges if 
converges
B. The convergence of an cannot be determined.
C. 
diverges if 
diverges
D. 
diverges if 
diverges, and 
converges if 
converges
Find the equation in standard form of the parabola described.The focus has coordinates (-21, 0), and the equation of the directrix is x = 21.
A. y2 = 84x B. y2 = -84x C. x2 = -84y D. y2 = -21x
Solve the problem. Assume that simple interest is being calculated in each case. Round to the nearest cent.Chris Owens opened a computer service company. To pay for startup costs, Chris Owens borrowed $62,000 from a bank at 4% for 1 year. Find the interest.
A. $3,100.00 B. $64,480.00 C. $2,480.00 D. $248.00
Find the values of x and y.
= 
A. x = 3, y = 2 B. x = 2, y = 3 C. x = 2, y = 2 D. x = 3, y = 3