PLS HELP solve the triangle. problem above

Mary had at least an 80% on her test write an inequality to represent this situation

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.

Ineed with this problem 21 show steps