Four students rode they bikes too school, I need to know who rode the fastest based on the graphs

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.

Collin did the work to see if 10 is a solution to the equation r/4=2.4

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table