You start hiking at an elevation that is 89 m below base camp you increase your elevation by 42 m what is the new elevation with respect to base camp

What is the range of this function? all real numbers such that y ≤ 40 all real numbers such that y ≥ 0 all real numbers such that 0 ≤ y ≤ 40 all real numbers such that 37.75 ≤ y ≤ 40

Can someone me and plz do the problem

Can someone me out here and the tell me the greatest common factor