How many ways can 12 volleyball team members line up if the captain and assistant captain must be together

Solve the equation for b: a= (1/2)(b)(h)

There are a total of 75 students in the robotics club and science club. the science club has 9 more students than the robotics club. how many students are in the science club?

Explain how you can show five less than a number using an algebraic expression