MATHEMATICS HIGH SCHOOL

A new crew of painters can paint a small apartment in 12 hours and experience crew can paint a small apartment in six hours how many hours does it take to paint the apartment on the true cruise work together

Answers

Answer 1
Answer:

Answer:

The new crew and the experience crew working together can paint the apartment in 4 hours.

Step-by-step explanation:

Given:

Time taken by new crew of painters to paint an apartment = 12 hours

Time taken by experience crew of painters to paint an apartment = 6 hours

To find the time taken by them to  paint the apartment working together.

Solution:

Using unitary method to determine their 1 hour work.

In 12 hours the new crew can paint = 1 apartment

So,in 1 hours the new crew can paint = (1)/(12) of the apartment

In 6 hours the experience crew can paint = 1 apartment

So,in 1 hour the experience crew can paint = (1)/(6) of the apartment

Now, the new crew and the experience crew are working together.

So, in 1 hour, they can paint :

⇒ (1)/(12)+(1)/(6)

Taking LCD = 12, we will add fraction.

⇒ (1)/(12)+(2)/(12)

⇒ (3)/(12)

Simplifying fraction we have:

⇒ (1)/(4) of an apartment

Again using unitary method to determine the time taken by them working together to paint the whole apartment.

They can paint  (1)/(4) of an apartment in 1 hour.

To paint 1 apartment they will take  = (1)/((1)/(4))=4 hours

Thus, the new crew and the experience crew working together can paint the apartment in 4 hours.

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Ralph sold brownies for ?$0.27 a piece in order to earn money to buy baseball cards. If the cards cost ?$0.81 per? pack, and if Ralph had no money left over after buying? them, what is the least number of brownies he must have? sold

Answers

Greetings!

Answer:

3 brownies

Step-by-step explanation:

To find this answer we need to divide the 0.81 by 0.27 to find out how many brownies total 0.81:

0.81 ÷ 0.27 = 3

So he needs to sell 3 brownies.


Hope this helps!

Aaron gives an estimate of 2 for the quotient in a division problem his teacher says his estimate is reasonable if the divisor is 4 which number could be the dividend in Aaron's problem help pleaseeee

Answers

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You must reverse the inequality sign when solving this inequality: x + 7 < 4True or false?

Answers

True because to solve the problem you can do 4-7 and that is -3 and when there is a negative you must switch the inequality sign

Answer: False.

Step-by-step explanation:

x + 7 < 4

x+7-7<4-7

x <-3

Hope this helps!

Please mark Brainliest! :)

Jack spends 1 and a quarter as long on his homework as Jill. Last week Jill spent 9 and three quarters of a hour on his homework. How long did Jack take??? Write the answer as a mixed number! Thnx!

Answers

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Answers

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Answer: 4845

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Answers

A correlation coefficient of 0.9 shows a strong, almost perfect correlation between the two variables. A positive correlation implies that when one variable increases, the other variable increases together with it. When one variable decreases, the other variable decreases as well. 
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