Pls help with these questions, will give BRAINLIEST (if you know the answer)

Graph the equationy= x+3[tex]y = x + 3[/tex]

Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together? 2.4 hours 2.5 hours

What is the total surface area of the square pyramid