Which expression is equivalent to (4 7i)(3 4i)? â€""16 37i 12 â€"" 28i 16 â€"" 37i 37 16i.

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.