Help me please with the steps on how you can find the number of solutions or zeros with these questions!

In the triangle abc< angle c is a right angle. find the value of the trig function indicated. find tan a if a =12, b=5 a. 13/12 b. 12/13 c. 5/12 d.12/5

In a school 2/3 of the students study a language of those who study a language 2/5 study french

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')