CREATE TABLE table_39531 ("Pos." FLOAT, "Car #" FLOAT, "Driver" TEXT, "Make" TEXT, "Team" TEXT)

Which Car # has a Make of toyota, and a Pos of 7?
SELECT AVG("Car #") FROM table_39531 WHERE "Make" = 'toyota' AND "Pos." = '7'
SELECT AVG("Car #") FROM "table_39531" WHERE "Make" = 'toyota' AND "Pos." = '7'