7,-28,112,-448 what is the next 2 numbers

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

Ineed your ! i was to turn this into pond first thing i gotta do is outline the inside with this plastic how big should i cut the plastic the height: 10 1/2” the length: 40” the width: 12” me !

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left