HELP PLEASE I DONT UNDERSTAND MATH

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.

The graph shows the distance kerri drives on a trip. what is kerri's speed?

Which type of graph would allow us to compare the median number of teeth for mammals and reptiles easily