What’s 5 plus 5 and 4000 plus 20000

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Need same math paper but the back now i hope your able to read it cleary i need with hw

Asandwich shop has 18 tables. each table seats up to 4 people. to find the greatest number of people that can be seated, you can solve p4 ≤ 18. which step is the best way to solve the inequality? plz asap i repeat plz