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Agata [3.3K]
3 years ago
10

Is 7/9 an irrational number?

Mathematics
2 answers:
Marina86 [1]3 years ago
4 0

Answer: No, this is not an irrational number.  

Step-by-step explanation: This is a rational number because its form x/y. Where x is 7 and y is 9.

-Rational number : a number that is expressed as a quotient or a fraction.

I hope this helps you out! :)

Mila [183]3 years ago
3 0

Answer:

7/9 is a rational number

Step-by-step explanation:

x/y where x=7 and y=9 aand an reatinal number is something that is composed of an integer

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Suppose that the rate of return on stocks is normally dis-tributed with mean of 9% and a standard deviation of 3%. If I pick fiv
alisha [4.7K]

Answer:

The probability that at least two stocks will have a return of more than 12% is 0.1810.

Step-by-step explanation:

Let <em>X</em> = rate of return on stocks.

The random variable <em>X</em> follows a Normal distribution, N (9, 3²).

Compute the probability that a stock has rate of return more than 12% as follows:

P(X\geq 12)=1-P(X

**Use the <em>z</em> table for the probability.

The probability of a stock having rate of return more than 12% is 0.1587.

Now define a random variable <em>Y</em> as the number of stocks that has rate of return more than 12%.

The sample size of stocks selected is, <em>n</em> = 5.

The random variable <em>Y </em>follows a Binomial distribution.

The probability of a Binomial distribution is:

P(X=x)={n\choose x}p^{x}(1-p)^{n-x};\ x=0, 1, 2, ...

Compute the value of P (X ≥ 2) as follows:

P (X ≥ 2) = 1 - P (X < 2)

              = 1 - P (X = 0) - P (X = 1)

              =1-{5\choose 0}(0.1587)^{0}(1-0.1587)^{5-0}-{5\choose 1}(0.1587)^{1}(1-0.1587)^{5-1}\\=1-0.4215-0.3975\\=0.1810

Thus, the probability that at least two stocks will have a return of more than 12% is 0.1810.

6 0
3 years ago
Help please answer fast!!!
pav-90 [236]

Answer:

4 \sqrt{2}

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

x2 +4x-21=0. solve for x

x =  \frac{7}{2}

x = 3 \frac{1}{2}  \ x = 3.5

6 0
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Find the equation of the line with slope = -2 and passing through (3,2). Write your equation in the form
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Answer:

Step-by-step explanation:

y - 2 = -2(x - 3)

y - 2 = -2x + 6

y = -2x + 8

3 0
3 years ago
A die is rolled. Find the probability of getting a 2. (answer in fraction form)
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If a die is rolled , the probability of getting a 2 is 1/6.
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