Find the probability of choosing a sixth-grader or a seventh-grader from a team that includes 5 sixth-graders, 9 seventh-graders, and
4 eighth-graders.

How do you solve a question like this?

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.

Which of the following is the result of expanding the series