Find the domain of the composite function f?g.f(x) = 
, g(x) = x + 7
A. (-?, -9) ? (-9, -7) ? (-7, ?)
B. (-?, ?)
C. (-?, -9) ? (-9, ?)
D. (-?, -16) ? (-16, ?)
Answer: D
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Find the least common multiple (LCM) of the pair of numbers.6 and 21n2
A. 42n2 B. 3 C. 126n2 D. 27n2
Simplify.
A. 
B. 
C. 
D. 
There were many names mentioned in this section. Give a brief description for the person named in problem, telling how they were related to the development of computers. ? Gottfried Leibniz ?
A. calculating device in 1617 B. founder of I.B.M computers C. 1st working computer, ENIAC D. developed WWW E. calculating device in 1695
Solve the problem.The linear equation y = 229x + 6320 provides an approximation of the annual cost (in dollars) to rent an apartment at the Leisure Village Retirement Community, where x = 1 represents 2011, x = 2 represents 2012, and so on. Write an equation that yields the same y-values when the exact year number is entered.
A. y = 229(x - 2011) + 6320 B. y = 229(x - 2010) + 6320 C. y = 229(2011 - x) + 6320 D. y = 229(2010 - x) + 6320