5.4 puzzle time what has four legs but can't walk answer key

What is the value of the expression "two less than six times the diffrence of a number and five" when n = 9?

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

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