I need help on another question, it keeps saying 7x-7 is wrong.

Answer:

Mean = np + n(n-1)p²

Standard Deviation= √ σ²   = √npq

Step-by-step explanation:

The m.g.f of the binomial probability distribution b(x;n,p) is derived as below.

M₀t = E (e)^tx

        = ∑(e)^tx (nCx) (p)^x q^(n-x)            { x varies from 0 to n}

        = ∑(e)^tx (nCx) (pe^t)^x q^(n-x)

          = (q +pe^t)^n

The expansion of this binomial is purely algebraic and need not to be interpreted in terms of probabilities.

WE get the moments by differentiating M₀(t)  once, twice, etc. with respect to t and putting t=0

Thus

μ₁`  = E(X) = [ d/dt (q +pe^t)^n]    t=0

     = [ npe^t (q +pe^t)^n-1]  t=0  

     = np

And

μ₂`  = E(X²) = [ d²/dt² (q +pe^t)^n]    t=0

      = [ npe^t (q +pe^t)^n-1]    +  [ n(n-1)p²e^²t (q +pe^t)^n-2]    t=0

= np + n(n-1)p²

Variance= μ₂= μ₂`  - μ₁`²

             σ² =E(X²)-  E(X)²

              σ² =np + n(n-1)p²- (np )²

             σ²   =npq

Standard Deviation= √ σ²   = √npq

Answer:

7 songs

Step-by-step explanation:

75% of 16 is 12

16 + 12 = 28

75% of 28 is 21

28 - 21 = 7

Answer:

7 songs

Step-by-step explanation:

Answer:

how do you do this

Step-by-step explanation:

Answer:

$123.28

Step-by-step explanation:

Multiple 102.73 by 1.2 and get 123.28

Answer:

123.28

Step-by-step explanation:

hahhahahaha hahahah

The solution to this problem is 5/2a^2b^5

Answer:

1/6

Step-by-step explanation:

1/2 divided by 3

Answer:

C.) [tex]x^2+2x-3[/tex]

Step-by-step explanation:

They give us the function; [tex]P(x)=x^3-7x+6[/tex], which is then divided by the binomial, [tex](x-2)[/tex].

We can use polynomial synthetic division to solve this! First, let's understand how we must use it properly.

As we can tell from the function [tex]P(x)=x^3-7x+6[/tex] , there is an exponent value of 3, and an "invisible" exponent of one on -7x. When doing the synthetic division, we must put in a zero before we introduce the term '-7x' in our process of division.

The binomial [tex](x-2)[/tex] tells us that we are dividing the function by that, but we have to take the opposite value of the integer value, and here's why.

[tex](x-2)=0[/tex]

If we are trying to solve for 'x' here, we have to add plus sides by two, and we get x=2. That is what we have to put on the left side of the synthetic division we will use, we are essentially stating that one of the root/solution(s) to the function is 2, and we get verification of that when the synthetic division results in zero towards the end.  

Then when the synthetic division has been done, since we are dividing by that binomial, we take out the values that we know already, which are '1', '2', and '-3', and take away one power of exponent to each of them (if applicable)

Thus, leaving us with our answer, [tex]x^2+2x-3[/tex].

The required quetient of the given expression is x² - 2x -3. Options C is correct.

It is a method for performing division of polynomials, with little writing and lesser calculations than complex division.

here,
synthetic division is given as,
put divisor equal zero,
x - 2 = 0 so x = 2

Now,
Arranging the division with zero and coefficients and constant of the expressions,

2    |   1  0   -7    6
     +      2   4   -6
----------------------------
          1  2  -3   0

So, the question, by synthetic division is given as x² + 2x -3.

Thus, the required quetient of the given expression is x² - 2x -3. Options C is correct.

Learn more about synthetic divisions here:

brainly.com/question/11850611

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Answer:

20=y*x = 2*10=20

Step-by-step explanation:

If this is what you are asking for here q-q

Answer:

If the triangle is the same length on the right it will be the same on the left so its 62°

Step-by-step explanation:

Hey! Hoped I helped Im Eve btw Have an amazing day and consider marking this  brainliest please. If you do thank you in advanced.

Answer:

58 degrees

Step-by-step explanation:

A triangle is 180 degrees total. 60+62= 122. 180-122= 58. The last angle is 58

Answer:

60° and 67°

Step-by-step explanation:

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

(49)

17x + 8 is an exterior angle of the triangle, thus

17x + 8 = 50 + 10x ( subtract 10x from both sides )

7x + 8 = 50 ( subtract 8 from both sides )

7x = 42 ( divide both sides by 7 )

x = 6

Thus

∠ C = 10x = 10(6) = 60°

(50)

99° is an exterior angle of the triangle, thus

2x + 10 + 6x + 1 = 99 , that is

8x + 11 = 99 ( subtract 11 from both sides )

8x = 88 ( divide both sides by 8 )

x = 11

Thus

∠ T = 6x + 1 = 6(11) + 1 = 66 + 1 = 67°

Answer:

50

Step-by-step explanation:

Let the number of teachers is t.

60% of t is 30

0.6t = 30

t = 30/0.6

t = 50

Step-by-step explanation:

theirs no expressions????

Answer:

its b

Step-by-step explanation:

Answer:62.73

sin-1 8 divide by 9

Answer:

5P= 2P+21+45 ( sum of two sides is is equal to

the opposite exterior angle)

5P=2P +61

5P-2P=61

3P=61

p= 61÷3

p=2.33333

Answer:

p=22

Step-by-step explanation:

idek how i got this answer but i think its right.

Answer:

it c

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

Answer:

[A] Null Set

Explanation:

Subtract 13 From Both Sides

|z| + 13 - 13 = 11 - 13

Simplify

z = -2

Absolute Value Cannot Be Less Than 0, Therefore There Is So Solution

[A] Null Set

Answer:

null set

Step-by-step explanation:

Answer:

15.243125

Step-by-step explanation:

we need to calculate how much would be the tax for 14.5$

so 14.5 * 5.125% = 0.743125

and then we will add that to 14.50

i dont feel like doing this i have to

Answer:

Step-by-step explanation:

the last one

Step-by-step explanation:

fihdjshshsjsbshdhddjdhdndjdbdhdb jseheidbdhdhdbehdndndnsjdnsjdndndjsjdndhdh sorry

The coordinates of F(x,y) is (5,-4) with midpoint of EF is M(1,-1)

What is midpoint of line segment?

The midpoint divides the line segment into two equal parts. As the number line progresses, the leftmost numbers become smaller, and the rightmost numbers become larger. Adding, subtracting, and multiplying can also be done using a number line like for addition move towards right and for subtraction move towards left.

Here, the mid point of line EF is M with coordinates (1,-1) with coordinates  of E(-3,2) therefore, using mid point formula to find coordinates of F(x,y)

[tex]\begin{aligned}\frac{-3+x}{2}&=1\\x&=2+3\\&=5\end{aligned}[/tex]

and for y coordinates of F :

[tex]\begin{aligned}\frac{2+y}{2}&=-1\\y&=-2-2\\&=-4\end{aligned}[/tex]

Therefore, the coordinates of F(x,y) is (5,-4) with midpoint of EF is M(1,-1)

Read more about midpoint at:

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Answer:

105 miles

Step-by-step explanation:

Answer:

A 16%

Step-by-step explanation:

Answer:

I wanna say the first picture second answer choice. Please tell me if I am right.

Step-by-step explanation:

Answer: The first group is the correct answer

Step-by-step explanation:

I took a test with this question got it right