Draw the graph of the equation and label the vertex.
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D. 
Answer: D
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Perform the indicated operations. Write the result in the form a + bj.
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B. 
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D. 
Multiply.
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Solve the problem.A bag contains 2 red marbles, 7 blue marbles, and 8 green marbles. If one marble is selected at random, determine the probability that it is blue.
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D. 
A wildlife biologist has spent the past 5 years studying the relationship between the length (inches) and the average weight (lb) of the striped bass. His results are summarized in the table below. Length(inches) Weight(lb) 14 3 18 6 22 11 26 14 Find the least squares regression line y = ax + b for the data in the table, where x represents the length of the fish in inches and y represents the weight in pounds. Use this regression line to estimate the average weight of a striped bass that is 21 inches in length.
A. y = 0.85(21) - 12.5 = 5.35 lb B. y = 0.95(21) - 10.5 = 9.45 lb C. y = 0.95(21) - 8.5 = 11.45 lb D. y = 0.75(21) - 9.5 = 6.25 lb E. y = 0.65(21) - 10.5 = 3.15 lb