Determine whether the pair are two equivalent expressions, two equivalent equations, or neither.x + 5 = 16 and x = 11
A. expressions
B. equations
C. neither
Answer: B
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Find the range of the function.
y = 2 + cosx Select the correct answer. a. (–?, ?) b. (2, ?) c. (–1, 1) d. (–1, 3) e. [1, 3]
Find the root if it is a real number.-
A. -3
B. - 
C. - 
D. ?
Divide.
A. -2x5
B. - 
C. -2x11
D. - 
Tank A contains 50 lbs of salt dissolved in 100 gal of water. Tank B contains 100 lbs of salt dissolved in 100 gal of water. The mixture from tank A is pumped to tank B at the rate of 75 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.
(a) Draw a two-compartment model for A(t ) and B(t ) . (b) Use the initial conditions A(0) = 50 and B(0) =100 to solve for A and B. (c) What are the equilibrium values of A and B?