Jill takes 2 hours to paint a room, Jim takes 3 hours to paint a room. How long (in minutes) will it take both of them to paint
a room
2 answers:
Answer:
72 minutes
Step-by-step explanation:
The sum of the rates of work in rooms per hour is ...
Jill's rate + Jim's rate
= (1/2 room/hour) +(1/3 room/hour) = (3/6 +2/6 room/hour) = 5/6 room/hour
__
Then the combined rate in hours per room is ...
1/(5/6 room/hour) = 6/5 hours/room = (6/5 hours/room)(60 minutes/hour)
= 72 minutes per room
Jill and Jim can paint the room in 72 minutes when they work together.
Jill will take 120 minutes to paint a room
Jim will take 180 minutes to paint a room
All together Jim and Jill will take 200 minutes to paint a room
You might be interested in
The answer is 3.06
0.34
x 9
_________
3.06 Just multiply 0.34*9=3.06 then count two places left to place the decimal point in the proper place
The correct answer is 2 3/4
Answer:
I plotted points since i cant draw lines very well with a mouse
Step-by-step explanation:
4x+5x = 90
9x = 90
x = 10
10y + 10 + 5x = 180
10y + 10 +5(10) = 180
10y + 60 = 180
10y = 120
y = 12
answer
<span>d) x = 10, y = 12</span>
A = -6
b = 48
Hope this helps :)
