Perform the desired operation. Write the answer in the form a + bi.(9 + 9i)(5 - 9i)
A. -36 + 126i
B. 126 + 36i
C. -81i2 - 36i + 45
D. 126 - 36i
Answer: D
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Solve for x.log8x = -5
A. -32,768
B. -390,625
C. 
D. 
Determine if the graph of the function opens upward or downward and whether it has a maximum or a minimum point.f(x) = 2 - 4x + 9x2
A. Downward, minimum B. Upward, minimum C. Upward, maximum D. Downward, maximum
Solve the problem.The graph depicts a relationship between scores achieved on an unspecified standardized test and family income. Suppose the score for a test is 485 when the family income is $25,000 and is 535 when the family income is $55,000. Let x be the income, in thousands, and y be the score of the test. Graph the two given pairs of incomes and scores. Assume that the relationship is linear. Draw a line though the two previous points. From your graph, estimates the score if the family income is $40,000. Label the axes, and show where the solution is located on the graph.
A. 
Standardized test score: 585
B. 
Standardized test score: 560
C. 
Standardized test score: 510
D. 
Standardized test score: 535
Find two different Hamilton paths for the given graph.
A. The graph does not have two different Hamilton paths. B. E ? A ? E ? F ? B ? C ? D ? H ? G ; A ? E ? F ? B ? C ? G ? H ? D C. A ? E ? F ? B ? C ? D ? H ? G ; A ? E ? F ? B ? C ? G ? H ? D D. C ? G ? H ? D ? C ? B ? F ? E ? A ; H ? G ? D ? C ? F ? B ? A ? E