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3 years ago

13

Will make brainiest if someone solves this

2 answers:

natali 33 [55]3 years ago

5 0

It a i’m positive !!

tekilochka [14]3 years ago

4 0

ME too I got this right

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Does anyone know this?

barxatty [35]

Answer:

$\Huge \boxed{-2}$

Step-by-step explanation:

$f(x)=-2x^2-2x+10$

For f(2), the input of the function is 2.

Let x = 2.

$f(2)=-2(2)^2-2(2)+10$

Evaluate.

$f(2)=-2(4)-2(2)+10$

$f(2)=-8-4+10$

$f(2)=-2$

8 0

4 years ago

Read 2 more answers

The ratio of boys to girls in a school is 9:10.

Over [174]

I need help myself lol XD

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3 years ago

The frequency table represents the job status of a number of high school students. A 4-column table with 3 rows titled job statu

labwork [276]

Answer: b

Step-by-step explanation:

4 0

3 years ago

in a given year, the rate of flu infection for the general public was 8.3%. And sample of 200 people who receive the flu vaccine

makkiz [27]

Answer:

$\fbox{\begin{minipage}{10em}Option A is correct\end{minipage}}$

Step-by-step explanation:

<em>Step 1: Define significance level</em>

In this hypothesis testing problem, significance levels α is selected: $0.05$ , the associated z-value from Laplace table:

Φ( $z$ ) = α - $0.5 = 0.05 - 0.5 = -0.45$

=> $z$ = $-1.645$

<em>Step 2: Define null hypothesis (</em> $H_{0}$ <em>) and alternative hypothesis (</em> $H_{1}$ <em>)</em>

$H_{0}$ : rate of flu infection $p$ = 8.3% or 8.3/100 = 0.083

$H_{1}$ : rate of flu infection $p$ < 8.3% or 8.3/100 = 0.083

<em>Step 3: Apply the formula to check test statistic:</em>

$K = \frac{f - p}{\sqrt{p(1 - p)} } * \sqrt{n}$

with $f$ is actual sampling percent, $p$ is rate of flu infection of $H_{0}$ , $n$ is number of samples.

The null hypothesis will be rejected if $K < z$

<em>Step 4: Calculate the value of K and compare with </em> $z$

$K = \frac{(\frac{3.5}{100}) - 0.083}{\sqrt{0.083(1 - 0.083)} } * \sqrt{200} = -2.46$

We have $-2.46 < -1.645$

=>This is good evidence to reject null hypothesis.

=> The actual rate is lower. (As $H_{1}$ states)

Hope this helps!

:)

5 0

3 years ago

The diameter of a circle is 32 yards. What is the circle's area?

elixir [45]

Answer:

3216.9

Step-by-step explanation:

6 0

4 years ago