What’s a cows favorite type of math?

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

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.

This is about circle theorems. someone asap : (