(Max Points) Do not answer if you’re not 100% sure. I’ll report if wrong.

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 Giuliahours to paint the room by herself.

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Giulia:

B)

1=1

so it's true

add an image !

step-by-step explanation:

3/4 ÷ 3/4

step-by-step explanation:

basically divide any proper fraction with itself to fit the criteria.

so if we are using 3/4, then:

3/4 ÷ 3/4 = 1

so 1 is the quotient.

and the numerators for both these fractions is 3.   and if we divide the numerators:

3 ÷ 3 = 1

we see that quotient is equal to our original quotient as well.