Answer:
no idea
Step-by-step explanation:
Both brothers paint the room together, it will take 2 hours 22 minutes.
Given that,
David can finish painting the room in 6 hours,
And his elder brother Antony can finish it in 4 hours.
We have to determine,
If both brothers paint the room together, how many hours will it take them.
According to the question,
David can finish painting the room in 6 hours,
And his elder brother Antony can finish it in 4 hours.
The combined time is given by the following formula.
Therefore,
For both brothers paint the room together, how many hours will it take them,
Taking reciprocal of both brothers time.
Then,
Which is equals to 2 hours 22 minutes.
Hence, Both brothers paint the room together, it will take 2 hours 22 minutes.
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Answer:
Step-by-step explanation:
1/6+1/4=5/12
5/12 of the job is done in 1 hour
so
5/12+5/12= 10/12
so 10/12 of the job is done in 2 hours
and then simplify 5/6 so then add 1/6
so it is done in 2 hours and 24 minutes
A.
(3, 1), (9, –1), (7, –4), and (1, –2)
B.
(3, 1), (9, –1), (7, 0), and (1, –2)
C.
(3, 5), (9, 3), (7, 0), and (1, 2)
D.
(1, 7), (7, 5), (5, 2), and (–1, 4)
to blue, how many red balls are there if 80 blue
balls are in the box?
a. 40
b. 60
The correct option is b. 60 if there are 80 blue balls by setting up a proportion using the given ratio and the number of blue balls.
To find the number of red ball to determine the ratio between red and blue balls. In this case, the ratio is 3:4 (red to blue).
Let x represent the number of red balls.
The proportion can be set up as
(3/4) = x/80.
Cross-multiplying gives:
4x = 3 * 80,
which simplifies to
4x = 240.
Dividing both sides of the equation by 4,gives:
x = 60.
Therefore, there are 6in the box by using ratio and proportion
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Answer:
B, 60
Step-by-step explanation:
red : blue
3 : 4
3 (20) : 4 (20)
60 : 80