Find the 13th term of the geometric sequence 5,10,20,...​

Part a : solve - vp + 40 < 65 for v . part b : solve 7w - 3r = 15 for r show your work!

F(x)= 1/x-4, g(x)=4x+1/x a. use composition to prove whether or not the functions are inverses of each other. b. express the domain of the compositions using interval notation.

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?