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2 years ago

Written as a simplified polynomial in standard form, what is the result when

1 answer:

8 0

$2x-8 - (2x+7)^2\\\\=2x-8 -(4x^2 + 2\cdot 2x \cdot 7 + 7^2)\\\\=2x-8-(4x^2 + 28x +49)\\\\=2x - 8 -4x^2-28x -49\\\\=-4x^2 -26x -57\\\\$

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In a recent survey of 25 voters, 17 favor a new city regulation and 8 oppose it. What is the probability that in a random sample

Rasek [7]

Answer:

$P(X=2)=(6C2)(0.68)^2 (1-0.68)^{6-2}=0.0727$

Step-by-step explanation:

1) Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

2) Solution to the problem

The probability in favor of the regulation based on the recent survey is:

$p = \frac{17}{25}=0.68$

Let X the random variable of interest "Number of favor respondents about the regulation", on this case we now that:

$X \sim Binom(n=6, p=0.68)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

And we want to find this probability:

$P(X=2)=(6C2)(0.68)^2 (1-0.68)^{6-2}=0.0727$

If we use X= "Number of respondednts opposed to the regulation we got the same answer", but on this case p = 1-0.68=0.32, and we want this probability:

$P(X=4)=(6C4)(0.32)^4 (1-0.32)^{6-4}=0.0727$

6 0

3 years ago

Plzzzzz helppppppppp

emmasim [6.3K]

Answer:

i think the rate of change is 1/4 which can be reduced to just 4.

Step-by-step explanation:

i hope this helps :))

(btw i love ur profile pic, BAKUGOOOOOOO)

3 0

2 years ago

please help !! I need the new equation, the vertex, the zeros, the y-intercept, and the maximum or minimum value

Volgvan

Answer:

1.py. zeroes

Step-by-step explanation:

3 0

2 years ago

Crop yield is the ratio of the number of bushels harvested to the number of acres used for the harvest. This year, a large farm

Salsk061 [2.6K]

The amount of rice harvested this year from 690 acres of farmland was 5211570 bushels

<h3>What is an equation?</h3>

An equation is an expression used to show the relationship between two or more numbers and variables.

This year, a large farm harvested rice from 690 acres of farmland. The crop yield was 7,553 bushels per acre.

Hence:

Amount of rice harvested = 7,553 bushels per acre * 690 acres = 5211570 bushels

The amount of rice harvested this year from 690 acres of farmland was 5211570 bushels

Find out more on equation at: brainly.com/question/2972832

4 0

2 years ago

On average, a person spends $240 every 3 months on their cellphone bill . What would the price for 1 month. How much would this

Elena L [17]

Answer:

$960

Step-by-step explanation:

price of one month = total expense/ number of month

= 240/3= $80

therefore persons annual expenses = 80*12= $960

3 0

2 years ago