All categories

3 years ago

Can someone solve? i’ll mark brainliest!

Mathematics

1 answer:

Vlad1618 [11]3 years ago

5 0

If you are looking for x the answer would be -3 because 2•-3=-6. -6+12=6
Hope this helps!

You might be interested in

EASY !! <br> Pls Answer!!<br> I’ll mark you as the brainiest!!

hoa [83]

Given:

The diameter of a sphere is 19 cm.

To find:

The volume of the sphere.

Solution:

We have,

$Diameter=19\text{ cm}$

$Radius=\dfrac{19}{2}\text{ cm}$

The volume of the sphere is

$V=\dfrac{4}{3}\pi r^2$

where, r is radius.

Putting $\pi=\dfrac{22}{7}, r=\dfrac{19}{2}$ in the above formula.

$V=\dfrac{4}{3}\times \dfrac{22}{7}\times (\dfrac{19}{2})^3$

$V=\dfrac{4}{3}\times \dfrac{22}{7}\times \dfrac{19}{2}\times \dfrac{19}{2}\times \dfrac{19}{2}$

$V=\dfrac{75449}{21}$

$V=3592.80952$

$V\approx 3592.8$

Therefore, the volume of the sphere is 3592.8 sq. cm.

5 0

2 years ago

A random variableX= {0, 1, 2, 3, ...} has cumulative distribution function.a) Calculate the probability that 3 ≤X≤ 5.b) Find the

olchik [2.2K]

Answer:

a) P ( 3 ≤X≤ 5 ) = 0.02619

b) E(X) = 1

Step-by-step explanation:

Given:

- The CDF of a random variable X = { 0 , 1 , 2 , 3 , .... } is given as:

$F(X) = P ( X =< x) = 1 - \frac{1}{(x+1)*(x+2)}$

Find:

a.Calculate the probability that 3 ≤X≤ 5

b) Find the expected value of X, E(X), using the fact that. (Hint: You will have to evaluate an infinite sum, but that will be easy to do if you notice that

Solution:

- The CDF gives the probability of (X < x) for any value of x. So to compute the P ( 3 ≤X≤ 5 ) we will set the limits.

$F(X) = P ( 3=$

- The Expected Value can be determined by sum to infinity of CDF:

E(X) = Σ ( 1 - F(X) )

$E(X) = \frac{1}{(x+1)*(x+2)} = \frac{1}{(x+1)} - \frac{1}{(x+2)} \\\\= \frac{1}{(1)} - \frac{1}{(2)}\\\\= \frac{1}{(2)} - \frac{1}{(3)} \\\\= \frac{1}{(3)} - \frac{1}{(4)}\\\\= ............................................\\\\= \frac{1}{(n)} - \frac{1}{(n+1)}\\\\= \frac{1}{(n+1)} - \frac{1}{(n+ 2)}$

E(X) = Limit n->∞ [1 - 1 / ( n + 2 ) ]

E(X) = 1

8 0

2 years ago

Help Ill give 100 points!

nata0808 [166]

Answer:

0, 1, 1/2

Step-by-step explanation:

First you would have to make them have the same denominators.

The lowest one they share is 24.

What ever you do to the bottom you have to do to the bottom.

1/6, times each by 4.

1 * 4 = 4

6 * 4 = 24

4/24.

Now you have to do the same thnig for 5/8.

But times it by 3, since 8 times 3 is 24.

5 * 3 = 15

8 * 3 = 24

15/24

Now subtract.

15 - 4 = 11/24

the difference is close to one half.

4/24 = 1/6 is close to 0.

15/24 = 5/8 is close to 1.

4 0

2 years ago

What is the exact volume of the cylinder

vladimir1956 [14]

Answer:

Volume = πr2h

= π×52×9

= 225π

= 706.85 inches3

Step-by-step explanation:

8 0

2 years ago

Of the 130 students distance learning math with Mr. Bischof, 63% of them actually work through the material. Approximately, how

QveST [7]

Answer:

Step-by-step explanation:

because 63% of 130 is 81.9

and since the question is asking approximately which means rounding, so you round 81.9 to get 82.

7 0

3 years ago