What is the measure of the angle formed by the angle bisector when two lines intersect, given that the adjacent angles are 40 degrees and 60 degrees?
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Quadratic equation: 2x^2 + 5x - 3 = 0.
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What is the average number of books read by 25 students in a year if 5 of them read 10 books, 10 of them read 7 books, and the other 10 students read 5 books?