Write an inequality to represent this situation Tony has $15 and saves $1.50 each day. Joan has $55 and spends $4.50 each day in how many days will tony have at least as much money as Joan

This doesn’t make sense to me it’s supposed to be lcm ( least common multiple )

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

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.