Death valley has an elevation of -282 feet relative to sea level explain how to use absolute value to describe the elevation of death valley as a positive integer

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Pls the last one and it has to be like number 6

Select the correct answer and solve for y