Find the fourth term a4 of the recursively defined sequence: a = 5, an = 3an-1 +n-2, where n > 2.

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.

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

Point q is equidistant from the sides of ∠tsr. find m∠rst.