Find the center of the hyperbola.y2 - x2 - 6y + 8x - 43 = 0
A. (-4, -3)
B. (-2, 3)
C. (4, 3)
D. (4, -3)
Answer: C
Mathematics
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What is the degree of the expression?(9 + 7x + 5x4)5
A. 20 B. 10 C. 15 D. 25
Mathematics
Solve the initial value problem.
+ 7y = 3; y(0) = 1
A. y = 
e7t + 
B. y = 
e-7t + 
C. y = 
e-7t + 
D. y = 
e7t + 
Mathematics
Solve the problem.The number of books, B, in a small library after t years is given by the function 
where t is measured in years. How many books will the library have after 6 years? (Round to the nearest unit.)
A. 5089 B. 2210 C. 2706 D. 3164
Mathematics
Translate the phrase; then simplify.Find the product of -4 and -20.
A. 76 B. -80 C. 80 D. -76
Mathematics