Need help on this one

Which of the following transformations will make coincide with ? a. counter-clockwise rotation 90º about a, followed by a translation 5 units to the right b. translation 5 units to the right, followed by a reflection across the y-axis c. translation 5 units to the right, followed by a reflection across the x-axis d. translation 1 unit up and 5 units to the right, followed by a reflection across the x-axis

On which number line are -3 and its opposite shown

If a and b are real numbers, then |a-b| is always, sometimes or never equal to |b-a| ?