I need help pls answer All 4 of the questions

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual 

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.