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dsp73
3 years ago
5

Help 20 POINTS, TOPIC: HOURLY RATES

Mathematics
1 answer:
Shtirlitz [24]3 years ago
6 0
B.
For all 3 to work together, they can paint 1 room per hour.
C.
John can paint a room at 1/4 of a room per hour.
Rick can paint a room at 1/5 of a room per hour.
Together they can paint a room at a rate of 9/20 of rooms per hour.
D.
1 = 1/4j + 1/5r + 11/20m (john, rick, molli)
E. 
The least common denominator is 20
F. 
1 = 1/4(0) + 1/5(0) + 11/20x
1 = 0 + 0 + 11/20x
1 = 11/20x
x = 1/(11/20)
x = 1 9/11 
It will take Molli 1 hour and 49 minutes (60 x 9/11) to paint the room alone.
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