Working together, rocco and giulia can paint a room in 3 hours. it would have taken rocco 7 hours to do the job alone. which equation can be used to determine r, giulia’s rate of work in parts per hour? a- 3/7+3r=7 b- 3/7 + 3r =1 c- 1/7 = r d- 3/7 = 3r

B

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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Giulia: =

A)

    1 = 7

    FALSE

B)    

    1 = 1

    TRUE

120 seems like the most sensible answer.

step-by-step explanation:

if there is only one topping on all caramel apples and there's 120 of them. then all apples should/will be covered in sprinkles. make sense?