CREATE TABLE table_13445 ("School" TEXT, "Location" TEXT, "Mascot" TEXT, "Enrollment" FLOAT, "IHSAA Class" TEXT, "County" TEXT, "Year Joined" FLOAT)

Which Year Joined has an Enrollment smaller than 726, and a School of tri-west?
SELECT MAX("Year Joined") FROM table_13445 WHERE "Enrollment" < '726' AND "School" = 'tri-west'
SELECT MAX("Year Joined") FROM "table_13445" WHERE "Enrollment" < '726' AND "School" = 'tri-west'