Determine whether the function is invertible. If it is, find the inverse.{(-2, 7), (2, -7), (7, -5), (-7, 5)}
A. {(7, -2), (-7, 2), (-5, 7), (5, -7)}
B. {(7, -2), (-2, 2), (-5, 7), (5, -7)}
C. {(7, -2), (-7, 2), (-5, 2), (5, -7)}
D. Not invertible
Answer: A
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sec x
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Tank A contains 25 lbs of salt dissolved in 100 gal of water. Tank B contains 40 lbs of salt dissolved in 100 gal of water. The mixture from tank A is pumped to tank B at the rate of 30 gal per hr, while the mixture from tank B is pumped to tank A at the same rate. Assume that the mixture in each tank is uniform by stirring. Let A(t ) and B(t ) be the amount of salt in tanks A and B after t hours, respectively.
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Perform the indicated operation and express in lowest terms.
- 
A. 
B. x + 3
C. 
D. 
Name the conic.
A. parabola B. circle C. ellipse D. hyperbola