Which function is the inverse of f(x)=50'000

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Answer! if you don’t mind, can you explain

Ten members of balin's soccer team ran warm ups for practice. each member ran the same distance. their combined distance was 5/6 of a mile. to find the distance that each member ran, balin wrote the expression below.