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2 years ago

What is the equation of the line in slop-intercept form?

Mathematics

2 answers:

NemiM [27]2 years ago

6 0

Answer:y=2.5x+5 i thank

Step-by-step explanation:

NNADVOKAT [17]2 years ago

5 0

Y = 5/2x + 5
or
y = 2.5x + 5

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Are 5/8 and 4/7 proportional

artcher [175]

Answer:no

Step-by-step explanation:

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3 years ago

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gizmo_the_mogwai [7]

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3 years ago

(1.4,1.6);m=3.1 equation of the line in point slope form

mart [117]

Answer:

y-4=3.1(x-1)

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Step-by-step explanation:

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2 years ago

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What is the formula for the expected number of successes in a binomial experiment with n trials and probability of success p? C

charle [14.2K]

Answer:

$(D)E[ X ] =np.$

Step-by-step explanation:

Given a binomial experiment with n trials and probability of success p,

$f(x)=\left(\begin{array}{c}n\\k\end{array}\right)p^x(1-p)^{n-x}, 0\leq x\leq n$

$E(X)=\sum_{x=0}^{n}xf(x)= \sum_{x=0}^{n}x\left(\begin{array}{c}n\\k\end{array}\right)p^x(1-p)^{n-x}$

Since each term of the summation is multiplied by x, the value of the term corresponding to x = 0 will be 0. Therefore the expected value becomes:

$E(X)=\sum_{x=1}^{n}x\left(\begin{array}{c}n\\x\end{array}\right)p^x(1-p)^{n-x}$

Now,

$x\left(\begin{array}{c}n\\x\end{array}\right)= \frac{xn!}{x!(n-x)!}=\frac{n!}{(x-)!(n-x)!}=\frac{n(n-1)!}{(x-1)!((n-1)-(x-1))!}=n\left(\begin{array}{c}n-1\\x-1\end{array}\right)$

Substituting,

$E(X)=\sum_{x=1}^{n}n\left(\begin{array}{c}n-1\\x-1\end{array}\right)p^x(1-p)^{n-x}$

Factoring out the n and one p from the above expression:

$E(X)=np\sum_{x=1}^{n}n\left(\begin{array}{c}n-1\\x-1\end{array}\right)p^{x-1}(1-p)^{(n-1)-(x-1)}$

Representing k=x-1 in the above gives us:

$E(X)=np\sum_{k=0}^{n}n\left(\begin{array}{c}n-1\\k\end{array}\right)p^{k}(1-p)^{(n-1)-k}$

This can then be written by the Binomial Formula as:

$E[ X ] = (np) (p +(1 - p))^{n -1 }= np.$

5 0

3 years ago

Find the perimeter of the figure to the nearest hundreth. <br> 7in 5in 7in 5in

nydimaria [60]

Perimeter - the length of all the sides
7+5+7+5=24
24 inches.

7 0

3 years ago