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Find the value of x. round the length to the nearest tenth

Sue's average score for three bowling games was 162. in the second game, sue scored 10 less than in the first game. in the third game, she scored 13 less than in the second game. what was her score in the first game?

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.