Find k such that f^(-1) (6)=2 given f(x)=k(x+1)/2x

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

How do you find principle and simple interest

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$