Sean says that to add a number to -100 and still have-100 is to add. Zero. Candace says that she xan add two numbers to -100 and still have -100. Who is correct and why?

I'm terrible at math any here is appreciated.

Chose the graph below that represents the following system of inequality’s

Polygons efgh and e′f′g′h′ are shown on the coordinate grid: what set of transformations is performed on efgh to form e′f′g′h′? a. a translation 1 unit to the left followed by a 90-degree counterclockwise rotation about the origin b. a translation 1 unit to the right followed by a 90-degree counterclockwise rotation about the origin c. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the right d. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the left