What is the vertex of the quadratic function y = -2x^2 + 4x - 3?
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Question: A rectangular cake is divided into 6 equal slices. If Lucy eats 2/3 of a slice, what fraction, decimal, and percentage of the whole cake did she eat?
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Question: "In triangle ABC, if AC = 5 cm, AB = 7 cm, and BC = 9 cm, what is the measure of angle BAC?" (