Solve for x, y, and z 5 2 -8 y plus x 11 7 4

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?

Prove that quadrilateral is a rhombus.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.