HELP PLEASE WILL MARK BRAINLIEST Sarah has 2343534 cookies and gives her friend 3948 cookies. How many cookies does she have left?(I forgot punctuation but you can probably tell the numbers)

If anyone has done the algebra 2 chaos theory portfolio would you be wiling to me? i kind of know what i'm doing i just don't know if i'm doing it right.

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

How do you use the elimination method for this question? explain, because i really want to understand!