Find the domain of the rational expression. 
A. {x|x is a real number and x ? -1}
B. {x|x is a real number}
C. {x|x is a real number and x ? 1}
D. {x|x is a real number and x ? 1 and x ? 3}
Answer: C
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Solve the problem.The annual population density of a species of insect after n years is modeled by a sequence. Suppose that the initial density of insects is 620 with r = 1.9. Write a recursive sequence that describes this data, where an denotes the insect density during year n.Find the terms a1 , a2 , a3 , ...., a5 . Round to two decimal places, if necessary.
A. a1 = 1178.00, a2 = 2238.20, a3 = 4252.58, a4 = 8079.90, a5 = 15,351.81 B. a1 = 620, a2 = 62.00, a3 = 6.20, a4 = 0.62, a5 = 0.06 C. a1 = 620, a2 = 1178.00, a3 = 2238.20, a4 = 4252.58, a5 = 8079.90 D. a1 = 620, a2 = 620, a3 = 620, a4 = 620, a5 = 620
Graph using the slope and the y-intercept.y = 4.953x + 2.038
A. 
B. 
C. 
D. 
Solve the problem.One pump can drain a pool in 12 minutes. When a second pump is also used, the pool only takes 2 minutes to drain. How long would it take the second pump to drain the pool if it were the only pump in use?
A. 1
min
B. 
min
C. 14 min
D. 2
min
Solve the equation.
x - 
= -3
A. {11} B. {-13} C. {-11} D. {13}