For which function is f(x) not equal to f-1(x)?

a- f(x)=2-x
b-f(x)=2/x
c=f(x)=-x
d=f(x)=2x

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Hello can you me find all the products

Im gonna fail 7th grade selective breeding 1. creates offspring which are genetically identical to the parent 2. is the process of breeding only organisms with desirable traits 3. involves the removal of the nucleus of a cell 4. combines traits from organisms of different species