Question

SUSAN NEEDS EXACTLY 4 PLATES ON EACH TABLE FOR THE BANQUET,AND 5 PLATES AT THE MAIN TABLE.IF SHE HAS 417 PLATES,HOW MANY TABLES IS SHE ABLE TO PREPARE?INCLUDE THE MAIN TABLE IN COUNT

Answer 1

Assuming that the table are all the same, the total number of plates  in two tables is:
4+5=9 plates

the sets of 9 plates in the total of 417 plates are:
417/9=139/3
thus the total number of tables will be:
139/3*2
=92.6667~93 tables