A popular Internet website is being redesigned. Developers of the website would like feedback from its users regarding the different design options. Which of the following sampling methods would be best for this situation?
A.
posting a survey on the website
B.
interviewing customers at a local bookstore
C.
publishing surveys in newspapers nationwide
D.
handing out surveys at malls in major cities

Hello, your answer is: 1079, because remember, this equation represents
*800 - (-279)
so, you need to use the method of KCC, or, k=keep, c=change, c=change.
you keep the 800 positive, switch the (-) subtraction sign to a (+) addition sign, and also, make the (-279) a positive 279. so you turn out with:
*800 + 279, which equals = 1079
*youre welcome :)