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3 years ago

Slope for y:2(x-y)-2(2x+7)=4

Mathematics

1 answer:

alex41 [277]3 years ago

8 0

Answer:

graph y=2x-7

Step-by-step explanation:

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A square has an area of 49 in.² what is each side of the perimeter

ludmilkaskok [199]

I hope this helps you

square one side a

Area=a.a

49=a.a

7.7=a.a

a=7

Perimeter=4a=4.7=28

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3 years ago

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I hope this is correct.
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3 years ago

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KiRa [710]

Answer:

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Step-by-step explanation:

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2 years ago

The common ratio of the sequence 3/4, 15/16, 75/64, is...

Pavlova-9 [17]

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3 years ago

From a group of 3 men and 4 women, a delegation of 2 is selected. What is the expected number of men in the delegation?

Ostrovityanka [42]

Answer:

The expected number of men in the delegation is 0.86.

Step-by-step explanation:

Number of men = 3

Number of women = 4

A delegation of 2 is selected.

Let X be the number of men selected. So, the possible values of X are 0,1,2.

$P(X=0)=\dfrac{^3C_0\times ^4C_2}{^7C_2}=\dfrac{2}{7}$

$P(X=1)=\dfrac{^3C_1\times ^4C_1}{^7C_2}=\dfrac{4}{7}$

$P(X=2)=\dfrac{^3C_2\times ^4C_0}{^7C_2}=\dfrac{1}{7}$

The expected number of men in the delegation is

$E(x)=0\times P(X=0)+1\times P(X=1)+2\times P(X=2)$

$E(x)=0\times \dfrac{2}{7}+1\times \dfrac{4}{7}+2\times \dfrac{1}{7}$

$E(x)=\dfrac{6}{7}$

$E(x)\approx 0.86$

Therefore, the expected number of men in the delegation is 0.86.

4 0

3 years ago