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4 years ago

6

PLSSSSSSS HELP!!!!!!!!!! WHOEVER ANSWER RIGHT GET MARK BRAINLEST

1 answer:

wariber [46]4 years ago

6 0

8.3 is your answer. Hope I helped :)

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For the following study, indicate whether it is an observational study or an experiment. Explain your reasoning. If it is an obs

Savatey [412]

Answer:

This study is an experiment

The response variable is the level of reaction (how excited they were) of the two groups after seeing their various shows and the explanatory variable are the two shows that was manipulated by the researchers.

Step-by-step explanation:

An observational study is a study where researchers collect data based on what is seen and heard and conclude based on the data collected. The researcher has no control over the variables, while an experiment is a method of applying treatments to a group and recording the effects of such treatments.

This study is an experiment because the researchers had control over the variables by manipulating the variables: showing Episode 1 of Season 8 to half of them and showing Episode 1 of Season 1 of a new comedy show to the other half. The response variable is the level of reaction (how excited they were) of the two groups after seeing their various shows and the explanatory variable are the two shows that was manipulated by the researchers.

6 0

3 years ago

Find the common ratio of the geometric sequence -17, 102, -612,...−17,102,−612,..

yKpoI14uk [10]

Answer:

-6

Step-by-step explanation:

common ratio r=102/(-17)=-6

5 0

3 years ago

baherus [9]

Answer:

$\huge \colorbox{red}{ \rm (3x - 7)(x + 1)}$

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>

factoring
PEMDAS

<h3>tips and formulas:</h3>

quadratic expression:ax²+bx+c

factoring quadratic:

Find two numbers that multiply to give ac, and add to give b
rewrite the middle with those numbers
factor out common terms
group

<h3>let's solve:</h3>

a is 3 and b is -7

$\quad ac=3\times -7$

therefore

$\quad ac=-21$

now we need to find two numbers that give -21

to do so we need to find the factors of 21

which are

$\quad 1,3,7$

likewise,

$\quad -1,-3,-7$

in this case we can take any two numbers from negative and positive factors that give us -21 and -4

3 and -7 are the two numbers that multiply to give -21 (3×-7=-21) and add to give -4. (3+(-7)=-4)

now let's factor:

$\sf rewrite \: - 4x \: as \: 3x - 7x : \\ \rm {3 x}^{2} + 3x - 7x - 7$
$\sf factor \: out \: 3x : \\ \rm 3x(x + 1) - 7x - 7$
$\sf factor \: out \: - 7 : \\ \rm 3x(x + 1) - 7(x + 1)$
$\sf \quad group : \\ \quad \rm (3x - 7)(x + 1)$

$\text{And we are done!}$

6 0

3 years ago

Read 2 more answers

the speed a car travels is inversely proportional to the time it takes to complete a 100 mile trip. which of the following graph

Tems11 [23]

Answer:

Inversely proportion states that a relationship between two variables in which the product is a constant.

If one of the variable increases, then the other decreases in proportion so that the product is unchanged.

If y is inversely proportional to x, then the equation is of the form

$y = \frac{k}{x}$ ; where k is the constant proportionality.

As per the given condition: Speed of a car is inversely proportional to the time it takes to complete a 100 mile trip,

Let x represents the speed of car and y represents the time taken.

From the given condition:

$x \propto \frac{1}{y}$

Then by definition of inversely proportional;

$x = \frac{k}{y}$ [Since, $speed = \frac{Distance}{Time}$ ]

Here, k represents the distance(i.e constant) = 100 miles.

therefore, the equation becomes now;

$x = \frac{100}{y}$ or

xy = 100

The following graph for the above equation as shown below :

7 0

4 years ago

1.4142 / 2 (must show work)

solmaris [256]

Answer:

2.378

Step-by-step explanation:

6 0

4 years ago