When they work together, they do 1/3 of the job in one hour.
(Bubba) + (Skeeter) = 1/3 job/hour
Subtract 'Bubba'
from each side: Skeeter = (1/3 job/hour) - (Bubba)
Bubba, working alone, does 1/8 of the job in one hour.
Skeeter = (1/3 job/hour) - (1/8 job/hour)
Can you subtract 1/8 from 1/3 ?
Before you can subtract, you'll need a common denominator.
I've got a nice one here . . . 24 .
1/3 = 8/24
1/8 = 3/24
Skeeter = (1/3 job/hour) - (1/8 job/hour)
= (8/24 job/hour) - (3/24 job/hour)
= 5/24 job/hour .
Skeeter mows at the rate of 5/24 field/hour.
The other way to look at that is: 24/5 hour/field = 4.8 hours .
Check:
Bubba: 1/8 field per hour = 0.125
Skeeter: 1/4.8 field per hour = 0.208333...
Together: (0.125 + 0.208333)
= 0.333... field per hour
= 3 hours/field . yay!
5/8 times what=3 and 3/4
convert 3 and 3/4 to improper
3 and 3/4=3+3/4=12/4+3/4=15/4
5/8 times what=15/4
times both sides by 8/5
what=120/20
what=12/2
what=6
6 times
Answer:
21 minutes divided by 7 walls = 3 minutes per wall for 5 people.
Assuming each worker has the same exact productivity, one person would take 15 minutes to paint a single wall (3 minutes x 5 people to get the amount of time for 1 worker per wall).
15 minutes for one worker multiplied by 5 walls = 75 minutes for one worker. Divide 75 minutes by 3 people = 25 minutes to paint all 5 walls with 3 people.
Step-by-step explanation:
E, 56, because you have 28 dollars, and you have to multiply that by two to get half dollars. 28*2=56.
