What is the solution of sqr root x-4+5=2

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.

Explain how you do each step what term makes it inconsistent y=2x - 4 ?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)