Solve the problem

Question

Tickets for a play are sold at two prices; $19, and $27. Find a formula for the total cost T(in dollars) of k tickets that sold for $19 per ticket and n tickets that sold for $27 per ticket.

Answer 1

Let's say you bought two $19 tix and four $27 tix. That would look like...

T = 19(2) + 27(4)

Instead, we bough k $19 tix and n $27 tix, both unknown quantities.

T = 19k + 27n