Carly took $21.25 to a carnival. Each ride ticket costs r dollars at the carnival, and Carly bought 4 ride tickets. Which expression represents the amount of money, in dollars, that carly had after she bought the tickets.

Answer: $21.25 - 4r

Step-by-step explanation:

Carly took $21.25 to a carnival.

A ride ticket costs r dollars and Carly bought 4 ride tickets. This mean Carly spent (4*r) dollars on ride tickets = 4r

The expression to show the amount Carly has left after buying the ride tickets will be equal to the amount Carly took to the market minus the total amount of ride tickets

= 21.25 - (4*r)

= 21.25 - 4r