CREATE TABLE table_77142 ("Blocks" TEXT, "Opponent" TEXT, "Home/Away" TEXT, "Minutes played" FLOAT, "Points" FLOAT, "Rebounds" FLOAT, "Assists" FLOAT)

How many minutes were played when there were 18 points and the opponent was Chicago Bulls?
SELECT COUNT("Minutes played") FROM table_77142 WHERE "Points" = '18' AND "Opponent" = 'chicago bulls'
SELECT COUNT("Minutes played") FROM "table_77142" WHERE "Opponent" = 'chicago bulls' AND "Points" = '18'