Respuesta :

Answer:

1,2,4, and 21

Step-by-step explanation:

Answer:

1: a customer will get 1 gallons for $3.50

2: A customer will get 2 gallons for $7.00

3: A customer will get 4 gallons for $14.00

4: A customer will pay 21 dollars for 6 gallons

Step-by-step explanation: