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 equ ation can be used to determine r, Giulia’s rate of work in parts per hour?
2 answers:
Answer:
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.
*******************************************************************************************
Answer:
4/21 a <u><em>room per hour</em></u>
Step-by-step explanation:
Rocco :
7hours———> whole room
then
in 1h ———-> 1/7 of the whole room
then
in 3h ———-> 3/7 of the whole room
therefore
Giulia will finish 4/7 of the whole room in 3h
finally,
You might be interested in
Answer:
where is the pic
Step-by-step explanation:
Answer:
E
Step-by-step explanation:
using the rule of radicals
× ⇔ , hence
= = × × [ = i]
= 2i → E
Answer:
He is reasonable to an extent, but he is not. He can saw 8 posts with the given materials.
Step-by-step explanation:
To make 9 posts. He would need 108 inches of material. He can only make 8 posts with the materials he has. With the remainder of the material he could possibly make 6/10ths of a post.
Use the quadratic formula:- x = [-(-8) +/- sqrt((-8)^2 -4*41)] / 2 x = ( 8 + sqrt (-100) / 2 and (8 - sqrt(-100) / 2 = 4 + 5i , 4 - 5i Answer
278 is rounded to 280 (to the tenth). Anything that is above 5 you right. In case this is 8 so you round. If it is below 5 then you do not round.