Need help on finding x for geometry.

Which statement describes the term economics? a. it is the study of using limited resources to fulfill wants and needs. b. it is the study of how governments fulfill the wants and needs of nations. c. it is the study of how people spend their money to fulfill wants and needs.

Solve for x, y, and z. show all steps.

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4