M is the midpoint of AB. AM=2x+9, MB=4x-5. Solve for x and find AB. A.) x= 2, AB=13
B.) x=2, AB=26
C.) x=7, AB=23
D.) x=7, AB=46

They are parallel because their slopes are equal.

Step-by-step explanation:

Slope of any line is the inclination of the line with the x -axis .Slope is the ratio of Rise and Run.

If two lines are parallel then they will be equally inclined to the x axis.

Two lines are parallel when their slopes are equal. If the lines are perpendicular then the product of their slopes is -1.Two lines will be AB and Cd will be parallel only if they have the same slope.