Which equation represents a line which is parallel to the line 2x+7y=-56

Without graphing the linear functions, find the coordinates of the point of intersection of their graphs: y=3x−11 and y=4

Δabc is reflected across line l to form δ alblcl, and a¯¯¯al¯¯¯¯ intersects line l at point d. which equation is not necessarily true?

The length of the line segment joining the midpoints of sides ab and bc of the parallelogram abcd is 10. find the length of diagnol ac