#### Answer

a. The magnitude is 1.3 and the direction is 0 degrees (positive x-axis).
b. The magnitude is 12.3 and the direction is 0 degrees (positive x-axis).
c. The magnitude is 12.3 and the direction is 180 degrees (negative x-axis).

#### Work Step by Step

vector A = (6.8, 0) and vector B = (-5.5, 0).
a. vector A + vector B = (1.3, 0). The magnitude is 1.3 and the direction is 0 degrees (positive x-axis).
b. vector A - vector B = (12.3, 0). The magnitude is 12.3 and the direction is 0 degrees (positive x-axis).
c. vector B - vector A = (-12.3, 0). The magnitude is 12.3 and the direction is 180 degrees (negative x-axis).