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3 years ago

Someone help me with this pleaseee..

Mathematics

1 answer:

Blababa [14]3 years ago

3 0

So whatever happened does not matter, They are only asking the volume of liquid left in A at the end. Therefore :

Calculation :

B + 120 = 4A

B = 4A - 120 ---------- 1

A - 120 = B ------------ 2

Subtract 2 from 1

B - B = 4A - 120 - A - 120

0 = 3A - 240

240 = 3A

240 ÷ 3 = A

8 = A

Answer :

A = 8

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5.6× 1/10 i need a answer pls

Usimov [2.4K]

Answer:

0.56

Step-by-step explanation:

Since 1/10 is 0.1 as a decimal you will then change it to 5.6 x 0.1 which would equal 0.56

Hope this helps :)

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3 years ago

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Step-by-step explanation:

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4 years ago

David Barnes and his fiancée Valerie Shah are visiting Hawaii. At the Hawaiian Cultural Center in Honolulu, they are told that

balandron [24]

Using the hypergeometric distribution, it is found that there is a 0.0065 = 0.65% probability that both David and Valerie get picked for the Tahitian dance lesson.

The people are chosen without replacement from the sample, hence the <em>hypergeometric distribution </em>is used to solve this question.

<h3>What is the hypergeometric distribution formula?</h3>

The formula is:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}$

$C_{n,x} = \frac{n!}{x!(n-x)!}$

The parameters are:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

In this problem:

There is a total of 18 people, hence $N = 18$ .

2 people will be chosen, hence $n = 2$ .

David and Valerie corresponds to 2 people, hence $k = 2$ .

The probability that both get picked is P(X = 2), hence:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}$

$P(X = 2) = h(2,18,2,2) = \frac{C_{2,2}C_{16,0}}{C_{18,2}} = 0.0065$

0.0065 = 0.65% probability that both David and Valerie get picked for the Tahitian dance lesson.

You can learn more about the hypergeometric distribution at brainly.com/question/25783392

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3 years ago

The Jayden family eats at a restaurant that is having a 15% discount promotion. Their meal costs $78.42 before the discount, and

guapka [62]

Answer:

77.30

Step-by-step explanation:

ur welcome

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3 years ago

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What's the equivalent of the expression -2 (-x +5y ) + 3 (2x - 6y)?

Anastasy [175]

Answer:

Step-by-step explanation:

-2 (-x +5y ) + 3 (2x - 6y)

Opening bracket

= 2x - 10y + 6x - 18y

= 8x - 28y

= 4(2x - 7y)

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3 years ago