Respuesta :

Answer:

1 1/2 hours

Step-by-step explanation:

add up all the times (3/4, 1/2, and 1/4)

you get 1 1/2

divide 9 by 1 1/2

you get 6

multiply 1/4 by 6

you get 1 1/2

Answer:

1 1/2 hours

Step-by-step explanation: hope this helps