If f(x) and f1(x) are inverse functions of each other and f(x)=2x+5 what is f1(8)? -1

3/2

41/8

23

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

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

How can you tell when x and y are not directly proportional?