Which is the equation of the function?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

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?