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3 years ago

Select all numbers that are irrational.

Mathematics

2 answers:

irina1246 [14]3 years ago

8 0

Answer:

√2 and π are irrational numbers

Step-by-step explanation:

zepelin [54]3 years ago

6 0

B, C, and D are all irrational

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Express the trinomial (2x+4)(x-1)

Oduvanchick [21]

The answer would be 2x^2+2x-4

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3 years ago

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Can one angle of a parallelogram be equal to 40° and another one 50°? Justify your reasoning.

Dahasolnce [82]

Short answer: No! <<=====
If the two are one after another, then they are not supplementary, which a parallelogram requires.

If they are in opposite corners, they must be equal. That's another property of parallelograms.

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3 years ago

Which represents the inverse of the function f(x) = 4x?

SSSSS [86.1K]

I think it will be
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4 years ago

The random variable K has a geometric distribution with mean 16. Which of the following is closest to the standard deviation of

sdas [7]

Answer: d. 15.49

Step-by-step explanation:

Given : The random variable K has a geometric distribution with mean 16.

Formula for Mean and standard deviation in geometric distribution:

$\mu=\dfrac{1}{p}$ (1)

$\sigma=\dfrac{\sqrt{1-p}}{p}$ (2), where p is the probability of success in each trial.

Since $\mu=16$ (Given)

Then from (1) ,

$\dfrac{1}{p}=16\\\Rightarrow\ p=\dfrac{1}{16}=0.0625$

Put value of p in (2),

$\sigma=\dfrac{\sqrt{1-0.0625}}{0.0625}=\dfrac{\sqrt{0.9375}}{0.0625}$

$=\dfrac{0.968245836552}{0.0625}$

$=15.4919333848\approx15.49$

Hence, the standard deviation of random variable K is closest to 15.49.

Therefore , the correct answer is d. 15.49 .

6 0

3 years ago

Find the slope of the line through (2,-2) and 5,-1)

Kitty [74]

Answer:

$m=\frac{1}{3}$

Step-by-step explanation:

$\mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}\\\\\left(x_1,\:y_1\right)=\left(2,\:-2\right),\:\\\left(x_2,\:y_2\right)=\left(5,\:-1\right)\\\\m=\frac{-1-\left(-2\right)}{5-2}\\\\m = \frac{-1+2}{3}\\ \\Simplify\\m = \frac{1}{3}$

4 0

4 years ago