For peeps who need brainliest

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

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

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?