68-40=28
28/4=7
therefore, 7 is your answer
(Hope it helps my friend ^_^)
Find the number in the tenth place 0 and look one place to the right for the rounding digit 9. Round up if this number is greater than or equal to 5 and round down if it is less than 5.
Answer: 0.1
I think it is y = -11/7x - 1 2/7.
I do not have an answer for that, but you should try looking for that on google or yahoo answers.