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2 years ago

Write the following as an algebraic expression: Twice the cube of z

Mathematics

1 answer:

konstantin123 [22]2 years ago

7 0

Answer:

z^3 • z^3 ? or z^3^2 ?

Step-by-step explanation:

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If you have two pennies, the probability of both coming up heads when flipped is _____.

Juli2301 [7.4K]

There are four side to 2 pennies
both (2) coming up head out all the side (4)
there is a 2/4 chance then simplify by dividing by 2/2 and get ½
so you have ½ chance of both becoming heads

Hope this helps :D

7 0

2 years ago

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A random variable X follows the uniform distribution with a lower limit of 670 and an upper limit of 750.a. Calculate the mean a

DENIUS [597]

You can compute both the mean and second moment directly using the density function; in this case, it's

$f_X(x)=\begin{cases}\frac1{750-670}=\frac1{80}&\text{for }670\le x\le750\\0&\text{otherwise}\end{cases}$

Then the mean (first moment) is

$E[X]=\displaystyle\int_{-\infty}^\infty x\,f_X(x)\,\mathrm dx=\frac1{80}\int_{670}^{750}x\,\mathrm dx=710$

and the second moment is

$E[X^2]=\displaystyle\int_{-\infty}^\infty x^2\,f_X(x)\,\mathrm dx=\frac1{80}\int_{670}^{750}x^2\,\mathrm dx=\frac{1,513,900}3$

The second moment is useful in finding the variance, which is given by

$V[X]=E[(X-E[X])^2]=E[X^2]-E[X]^2=\dfrac{1,513,900}3-710^2=\dfrac{1600}3$

You get the standard deviation by taking the square root of the variance, and so

$\sqrt{V[X]}=\sqrt{\dfrac{1600}3}\approx23.09$

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2 years ago

What is the answer to x and y

Olin [163]

Answer:

y= 128, x=52

Step-by-step explanation:

The Sum of all the angles in a quadrilateral is 360.

y is 128 because both those angles are equal

the other 2 angles are also equal to each other.

360 - 128-128= 104

104/2 is 52

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1 year ago

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Hi! Can I please have help on solving linear graphing problems?

ElenaW [278]

Answer:print out starter sheets

Step-by-step explanation:

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2 years ago

PLEASE HELPPP. What is the value of X? type the number TYPE ONLY THE NUMBER

masha68 [24]

Answer:

Value of X is 11

Step-by-step explanation:

hope it helps

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2 years ago