So, first you would distribute 2 and 1/4 which is 1/2z then do 2 times 8 which is 16 and have it as 1/2z-16 then take 1/4z and add it to 1/2 since your adding the two expressions. So whatever 1/4z plus 1/2z is then you subtract is to 16 minus 6, because 6 is in your other expression. It's kinda hard to explain but the answer is C haha Hope this helped!