Four groups of some amount equals 52 in a algebraic equation

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left

State one method by which you can recognize a perfect square trinomial.