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3 years ago

I want to answer this question

Mathematics

2 answers:

Alex73 [517]3 years ago

5 0

-2 is your right answer

Mars2501 [29]3 years ago

3 0

The answer is -2 because any number times a NEGATIVE number ( unless it's a negative and a negative ) makes a negative number.

So 2 times 1 is 2. And then just add the negative sign.

You might be interested in

What is 16.437 rounded to the nearest whole number

yaroslaw [1]

Hello,

Question- What is 16.437 rounded to the nearest whole number

Answer- 16

Well to round up to higher numbers you need to have a 5 or higher and it seems that 16.(4)37 so that 4 is lower than a 5 in that case you will stay with 16!

Important- If my answer helped you please mark me as brainliest thank you and have the best day ever!

6 0

3 years ago

A foreign student club lists as its members 2 Canadians, 3 Japanese, 5 Italians, and 2 Germans. If a committee of 4 is selected

Fittoniya [83]

Answer:

(a) The probability that the members of the committee are chosen from all nationalities $=\frac{4}{33}$ =0.1212.

(b)The probability that all nationalities except Italian are represent is 0.04848.

Step-by-step explanation:

Hypergeometric Distribution:

Let $x_1$ , $x_2$ , $x_3$ and $x_4$ be four given positive integers and let $x_1+x_2+x_3+x_4= N$ .

A random variable X is said to have hypergeometric distribution with parameter $x_1$ , $x_2$ , $x_3$ , $x_4$ and n.

The probability mass function

$f(x_1,x_2.x_3,x_4;a_1,a_2,a_3,a_4;N,n)=\frac{\left(\begin{array}{c}x_1\\a_1\end{array}\right)\left(\begin{array}{c}x_2\\a_2\end{array}\right) \left(\begin{array}{c}x_3\\a_3\end{array}\right) \left(\begin{array}{c}x_4\\a_4\end{array}\right) }{\left(\begin{array}{c}N\\n\end{array}\right) }$

Here $a_1+a_2+a_3+a_4=n$

${\left(\begin{array}{c}x_1\\a_1\end{array}\right)=^{x_1}C_{a_1}= \frac{x_1!}{a_1!(x_1-a_1)!}$

Given that, a foreign club is made of 2 Canadian members, 3 Japanese members, 5 Italian members and 2 Germans members.

$x_1$ =2, $x_2$ =3, $x_3$ =5 and $x_4$ =2.

A committee is made of 4 member.

N=4

(a)

We need to find out the probability that the members of the committee are chosen from all nationalities.

$a_1$ =1, $a_2$ =1, $a_3$ =1 , $a_4$ =1, n=4

The required probability is

$=\frac{\left(\begin{array}{c}2\\1\end{array}\right)\left(\begin{array}{c}3\\1\end{array}\right) \left(\begin{array}{c}5\\1\end{array}\right) \left(\begin{array}{c}2\\1\end{array}\right) }{\left(\begin{array}{c}12\\4\end{array}\right) }$

$=\frac{2\times 3\times 5\times 2}{495}$

$=\frac{4}{33}$

=0.1212

(b)

Now we find out the probability that all nationalities except Italian.

So, we need to find out,

$P(a_1=2,a_2=1,a_3=0,a_4=1)+P(a_1=1,a_2=2,a_3=0,a_4=1)+P(a_1=1,a_2=1,a_3=0,a_4=2)$

$=\frac{\left(\begin{array}{c}2\\2\end{array}\right)\left(\begin{array}{c}3\\1\end{array}\right) \left(\begin{array}{c}5\\0\end{array}\right) \left(\begin{array}{c}2\\1\end{array}\right) }{\left(\begin{array}{c}12\\4\end{array}\right) }+\frac{\left(\begin{array}{c}2\\1\end{array}\right)\left(\begin{array}{c}3\\2\end{array}\right) \left(\begin{array}{c}5\\0\end{array}\right) \left(\begin{array}{c}2\\1\end{array}\right) }{\left(\begin{array}{c}12\\4\end{array}\right) }$ $+\frac{\left(\begin{array}{c}2\\1\end{array}\right)\left(\begin{array}{c}3\\1\end{array}\right) \left(\begin{array}{c}5\\0\end{array}\right) \left(\begin{array}{c}2\\2\end{array}\right) }{\left(\begin{array}{c}12\\4\end{array}\right) }$

$=\frac{1\times 3\times 1\times 2}{495}+\frac{2\times 3\times 1\times 2}{495}+\frac{2\times 3\times 1\times 1}{495}$

$=\frac{6+12+6}{495}$

$=\frac{8}{165}$

=0.04848

The probability that all nationalities except Italian are represent is 0.04848.

6 0

3 years ago

Please answer question

Nata [24]

Answer:

given below.

Step-by-step explanation:

for f(x):

2√2

for g(x):

2√2

2√3

2√5

for h(x):

4+2√2

4 0

2 years ago

Michael has $15 and wants to buy a combination of school lunches to feed at least three classmates. A sandwich costs $2, and hot

erica [24]

Answer:

he can get 4 hot lunch for him qnd his class mate so he will have $3 more

3 0

2 years ago

Joshua sold a batch of tickets for carnival rides. The ratio of adult tickets to child tickets was 2:5.

schepotkina [342]

The total number of adult tickets sold is 250.

<h3>What is the total number of adults tickets sold?
</h3>

Let the initial number of adult's ticket sold be represented with x
Let the initial number of children's ticket sold be represented with y

x / y = 2/5

Cross multiply :5x = 2y

y = 5/2

y = 2.5x

(x + 70) / (y + 300) = 1/3

Cross multiply :210 + 3x = 300 + y

Substitute for y

210 + 3x = 300 + 2.5x

300 - 210 = 3x - 2.5x

90 = 0.5x

x = 90 / 0.5

x = 180

Total tickets sold = 180 + 70 = 250

To learn more about ratios, please check: brainly.com/question/9194979

#SPJ1

3 0

1 year ago