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4 years ago

Answer the following questions CORRECTLY I will know if this is wrong. I WILL REPORT ANY INCORRECT ANSWERS!

Mathematics

1 answer:

AleksAgata [21]4 years ago

5 0

Answer by JKismyhusbandbae:

$\mathrm{Add\:}5\mathrm{\:to\:both\:sides}\\\frac{1}{4}b+\frac{2}{5}b-5+5=-3+5\\Simplify\\\frac{1}{4}b+\frac{2}{5}b=2\\\mathrm{Find\:Least\:Common\:Multiplier\:of\:}4,\:5:\quad 20\\\mathrm{Multiply\:by\:LCM=}20\\\frac{1}{4}b\cdot \:20+\frac{2}{5}b\cdot \:20=2\cdot \:20\\Refine\\5b+8b=40\\13b=40\\\mathrm{Divide\:both\:sides\:by\:}13\\\frac{13b}{13}=\frac{40}{13}\\Simplify\\b=\frac{40}{13}$

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Answer:

Step-by-step explanation:

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3 years ago

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Katena32 [7]

This is in gradient intercept form (or slope intercept form)
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3 years ago

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3 years ago

What is the area of the rhombus in simplest radical form? The figure is not drawn to scale.

Tanya [424]

The area of the Rhombus is 162√3 sq.unit , Option A is the correct answer.

<h3>What is a Rhombus ?</h3>

A rhombus is a polygon , which has four equal sides , its diagonal bisect each other at 90 degree.

Let x be the half of the other diagonal.

tan 60 = x / 9

x = 9 tan 60

x = 9√3

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brainly.com/question/27870968

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2 years ago

For X a binomial random variable with n=5 and p=1/4, answer the following

mash [69]

Recall that for $X\sim\mathrm{Bin}(n,p)$ , i.e. a random variable $X$ following a binomial distribution over $n$ trials and with probability parameter $p$ ,

$\mathbb P(X=x)=f_X(x)=\begin{cases}\dbinom nx p^x(1-p)^{n-x}&\text{for }x\in\{0,1,\ldots,n\}\\\\0&\text{otherwise}\end{cases}$

So you have

$\mathbb P(X=2)=\dbinom52\left(\dfrac14\right)^2\left(1-\dfrac34\right)^{5-2}=\dfrac{135}{512}\approx0.26$

$\mathbb P(2\le X\le4)=\displaystyle\sum_{x=2}^4\mathbb P(X=x)$
$=\dbinom52\left(\dfrac14\right)^2\left(1-\dfrac14\right)^{5-2}+\dbinom52\left(\dfrac14\right)^3\left(1-\dfrac14\right)^{5-3}+\dbinom52\left(\dfrac14\right)^4\left(1-\dfrac14\right)^{5-4}$
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3 years ago