Find the domain of the function.y = 
A. all real numbers except -2
B. (2, ?)
C. (-?, 2)
D. all real numbers except 2
Answer: D
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Solve the problem.A manufacturer of DVD players has monthly fixed costs of $5500 and variable costs of $50 per DVD player and it sells the DVD players for $150 per unit. Write the function that models the profit P from the production and sale of x DVD players in a month.
A. P = 100x - 5500 B. P = 5500x - 100 C. P = 100x + 5500 D. P = 200x - 5500
Factor the trinomial.s2 + 6s + 8
A. (s + 8)(s - 1) B. (s + 8)(s + 6) C. (s - 4)(s - 2) D. (s + 4)(s + 2)
Use a graphing calculator to estimate the solution set of the equation. Round to the nearest hundredth.2 - x = 5-x
A. {1.86} B. {-0.59, 1.96} C. {2.06} D. {3.06}
Calculate the standard deviation of X for the probability distribution.
x1234
0.20.30.30.2 ?
Round your answer to two decimal places if necessary.
?
A. 1.05 B. 1 C. 1.02 D. 2.5 E. 5