Ineed with math how do you do this problem
3x-4y=12

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

A(t)=728(1+0.04)^t how much money did aditya originally invest

What are “like terms”? why can we only add like terms?