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2 years ago

Use rousing or compatible numbers tu estimate the sum 87+34

1 answer:

3 0

Well, it gives you a 2nd option in which you can use, compatible is a much easier word to understand and it means the two numbers are <span>able to existur together without conflict (google definition)

hopefully it helps?</span>

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A $1,287.99 TV was marked down at a 12% discount. What is the discounted price (or the reduced selling price)?

son4ous [18]

Answer:

1133.4312 US$

Step-by-step explanation:

Just use a calculator or write it down

7 0

2 years ago

Read 2 more answers

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

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

$\mathbb P(2\le X\le4)=\displaystyle\sum_{x=2}^4\mathbb P(X=x)$
$=\dbinom52\left(\dfrac14\right)^2\left(1-\dfrac14\right)^{5-2}+\dbinom52\left(\dfrac14\right)^3\left(1-\dfrac14\right)^{5-3}+\dbinom52\left(\dfrac14\right)^4\left(1-\dfrac14\right)^{5-4}$
$=\dfrac{375}{1024}\approx0.37$

The expected value of $X\sim\mathrm{Bin}(n,p)$ is simply $np$ , while the standard deviation is $\sqrt{np(1-p)}$ . In this case, they are $\dfrac54=1.25$ and $\sqrt{\dfrac{15}{16}}\approx0.97$ , respectively.

7 0

3 years ago

Can y’all help me please<br> U need someone to explain it for me

faltersainse [42]

Answer:

There it is written Example 5 (hint)

Step-by-step explanation:

please follow me those all are watching this I will mark u all as Brainliest if u all will follow

6 0

3 years ago

How to add -89 and 17 step by step

Debora [2.8K]

Step-by-step explanation: The easiest way to do this and the way I commonly use is to subtract 17 from 89then make it negative as you are making the negative number smaller by adding a smaller number therefore your answer is -72

6 0

2 years ago

What equation would you use to solve for x?

Brut [27]

I think you would use the equation 2x+1+33+90=180

3 0

2 years ago