What is the answer to this question?

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

High schoolmathematics 5 points keith is the leading goal scorer for a team in an ice hockey league. last season, he scored 42 goals in 82 games. assuming he scores goals at a constant rate, what is the slope of the line that represents this relationship if the number of games is along the x-axis and the number of goals is along the y-axis?

State if the two triangles are congruent. if they are, state how you know?