What is the image of (2,8) after a reflection over the line y = x?

What does x represent in the formula for the compound xcl4?

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?