Explain the error in the work shown. Find the correct answer.

The sum of two numbers is 86, and their difference is 20. find the two numbers

What is the total surface area of this square pyramid?

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