Can someone please answer this asap

What is the inverse of the function f(x)=2x+1

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

10% of 1,900,000. show me how you got the answer