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3 years ago

14

What is the Expected value of the probability distribution also called?

1 answer:

Fittoniya [83]3 years ago

8 0

Answer:

The expected value is also known as the expectation, mathematical expectation, mean, average, or first moment.

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<img src="https://tex.z-dn.net/?f=f%28x%29%20%3D%20%7B2%7D%5E%7Bx%7D%20%20%20%2B%203" id="TexFormula1" title="f(x) = {2}^{x} +

lisov135 [29]

The function is given $f(x)=2^x+3$ .

Now let's solve for $f(-2)$ .

$f(-2)=2^{-2}+3$

Rule of negative exponent: $x^{-1}=\frac{1}{x^1}$ .

$f(-2)=\frac{1}{2^2}+3$

$f(-2)=\frac{1}{4}+\frac{3}{1}$

Rule for sum of fractions: $\frac{a}{b}+\frac{c}{d}=\frac{ad+bc}{bd}$ .

$f(-2)=\frac{13}{4}$

And the result is:

$f(-2)=\boxed{\frac{13}{4}=3.25}$

4 0

3 years ago

50 points plus brainliest please help screenshot provided

never [62]

Answer:

$\textsf{(a)} \quad (3x)^{\circ}+(x+14)^{\circ}=90^{\circ}$

$\textsf{(b)} \quad m \angle 1=\boxed{57}\:^{\circ}$

$m \angle 2=\boxed{33}\:^{\circ}$

Step-by-step explanation:

From inspection of the given diagram:

$m \angle 1=(3x)^{\circ}$

$m \angle 2=(x+14)^{\circ}$

<h3><u>Part (a)</u></h3>

A right angle is 90° and is represented by the ∟ symbol.

To find x, <u>equal</u> the sum of the angles to 90° and solve for x:

$\implies m \angle 1+m\angle2=90^{\circ}$

$\implies (3x)^{\circ}+(x+14)^{\circ}=90^{\circ}$

$\implies 3x+x+14=90$

$\implies 4x+14=90$

$\implies 4x+14-14=90-14$

$\implies 4x=76$

$\implies 4x \div 4=76 \div 4$

$\implies x=19$

<h3><u>Part (b)</u></h3>

To find the degree measure of each angle, substitute the found value of x into the expression for each angle.

$\implies m \angle 1=(3 \cdot 19)^{\circ}=57^{\circ}$

$\implies m \angle 2=(19+14)^{\circ}=33^{\circ}$

6 0

2 years ago

Read 2 more answers

Miranda and Savannah are excited that a new store just opened in town! They go together the first day it opens!

Kitty [74]

Answer:

9

Step-by-step explanation:

Lowest Common Multiple of 7 and 9 is 63.

7x9 times (Miranda)

9x7 times (Savannah)

5 0

4 years ago

What is the sum of 12 plus 34

kaheart [24]

The sum of 12 plus 34 is 46

8 0

3 years ago

Amelia started with $50 in her savings account and adds $10 each week to it. Arturo deposits the same amount of money each week

Marrrta [24]

Answer:

*15$ by 12$

Step-by-step explanation:

6 0

3 years ago