The probabilities by subject of on-time assignment submission and on-time arrival to class are given in the table. what is the chance of on-time assignment submission if it is a chemistry assignment?

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.