Q3 Jason has a collection of 120 baseball cards. He let his friend Justus get 1/4 of his collection and sells 1/5 to ebay. He took 20 to give to his little brother. How many more baseball cards remain in Jason's collection? Please Help​

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

When the ball has traveled a distance of

How is this equation completed? i cannot find any examples in the book.