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Nata [24]
2 years ago
11

Robert can paint a certain wall in 4 minutes, while it takes Jack 12 minutes to paint the same wall. How long will it take Rober

t and Jack to paint the wall working together?
Mathematics
1 answer:
olga_2 [115]2 years ago
3 0
It will take 24 minutes.
this is because the lowest common multiple is 24.

hope this helps you
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Please give me the the answer of the question in the link that's 50 points
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Step-by-step explanation:

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Help me out , plzzzzz!!
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Answer:

a. 5,040 ways

b. 210 ways

Step-by-step explanation:

a) We want to pick 4 numbers out of 10 given that orders matter

If orders do matter, it will be a permutation problem

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n P r = n!/(n-r)!

In this case, n is 10 and r is 4

Thus, we have it that;

10 P 4 = 10!/(10-4)! = 5,040

b) if orders do not matter

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3 0
2 years ago
*31. Priya and Ravish planned to participate in a cycle race to be organised for National integration. They decided
Julli [10]

Answer:

36 minutes

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3 rounds for Ravish

Step-by-step explanation:

The answer is the LCM (least common multiple) of 12 and 18.

12 = 2^2 x 3

18 = 3^2 x 2

=>LCM of 12 and 18 = 2^2 x 3^2 = 4 x 9 = 36

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=> At that time, Priya has completed: 36/18 = 2 rounds

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3 years ago
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Step-by-step explanation:

-4x - 6y = 6

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However, when we also have a -6y term in the first equation and 6y term in the second equation, so adding these together will also eliminate the y term, leaving a 0 on the left-hand side of the equation.

If we add the two numbers on the right side of the equation, we get -2, which does not equal 0, meaning there are no solutions to this system of equations.

3 0
2 years ago
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