johnsift
contestada

working together, rocco and giulia can paint a room in 3 hours. it would take rocco 7 hours to do it alone. what is Giulia's rate of work in parts per hour?

Respuesta :

Leofy

Answer:

B :  3/7 + 3r = 1

Step-by-step explanation:

Rocco:  of the job per hour

Giulia:  of the job per hour

Together:  of the job per hour

Rocco + Giulia = Together

+  =  

+  =  

3x + 21 = 7x

      21 = 4x

       

It will take Giulia  hours to paint the room by herself.

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