What type of transformation has the same effect as each composition of transformations?

translation (x,y) ---> (x+4,y) followed by a reflection across the line y=-4

Translation (x,y)---> (x+4,y+8) followed by (x,y)---> (x-2,y+9)

Reflection across the line y=7, and then across the line y=3

Reflection across the line y=x, and then across the line y=2x+5

These are all separate problems, not one.