21, 30, 12 clock calculator bulb picture puzzle answers

What expression is equivalent to (2x-1)(x-3)?

Write a story that matches with the expression 42x-5 pls hurry

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