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N76 [4]
3 years ago
13

Really easy for high schoolers (The first correct answer gets brainliest! )

Mathematics
1 answer:
Arturiano [62]3 years ago
8 0

Answer:-18

Términos en este conjunto (8)

Original

El Swing encarna el espíritu de la Revolución Francesa.

falso

El Swing fue un éxito inmediato debido a su brillantez técnica y al escándalo detrás de él.

cierto

Las pinturas de Jean-Honoré Fragonard tratan temas religiosos serios.

falso

Las pinturas Marriage A-la-Mode de Hogarth corresponden y, en ocasiones, evocan deliberadamente el arte francés y el diseño rococó.

cierto

En la serie Marriage A-la-Mode de Hogarth, Lord Squanderfield es robusto y saludable.

falso

Step-by-step explanation:

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Holly checked her answer to a division problem by estimating the quotient. Which is the best estimation of the quotient?
Andre45 [30]
Answer: 4

Try just dividing 23/5 and you’d get 4 something. But since 5.97 is close to 6 you can also mentally divide 23/6 and get 3something (it’d be really close to 4)



5 0
3 years ago
Read 2 more answers
A line passes through (−1, 7) and (2, 10).
Pachacha [2.7K]
The slope m of a line through points A(x_1, y_1) and B(x_2, y_2)  is given by :<span>

\displaystyle{m = \frac{y_2-y_1}{x_2-x_1}&#10;



Thus, the slope of the line passing through points </span><span>(−1, 7) and (2, 10) is 

</span>\displaystyle{m= \frac{10-7}{2-(-1)}= \frac{3}{3}=1
<span>

The equation of a line with slope m passing through a point P(a, b) is given by
                                        (y-b)=m(x-a).


We can consider any of the points (-1, 7), or (2, 10). Let's choose (2, 10):

                                        y-10=1(x-2)
                                        y-10=x-2
                                           y-x=-2+10
                                           y-x=8
                                       

  Answer: </span><span>C. −x+y=8</span>
7 0
3 years ago
HELP ASAP WILL MARK AS BRAINILEST TO WHOEVER GETS IT RIGHT
mixas84 [53]
The correct answer is B. For sure it is. It took a while to solve in my head
8 0
3 years ago
You are given the following information obtained from a random sample of 5 observations. 20 18 17 22 18 At 90% confidence, you w
Margaret [11]

Answer:

a

  The null hypothesis is  

         H_o  : \mu  =  21

The Alternative  hypothesis is  

           H_a  :  \mu<   21

b

     \sigma_{\= x} =   0.8944

c

   t = -2.236

d

  Yes the  mean population is  significantly less than 21.

Step-by-step explanation:

From the question we are given

           a set of  data  

                               20  18  17  22  18

       The confidence level is 90%

       The  sample  size  is  n =  5  

Generally the mean of the sample  is  mathematically evaluated as

        \= x  =  \frac{20 + 18 +  17 +  22 +  18}{5}

       \= x  =  19

The standard deviation is evaluated as

        \sigma =  \sqrt{ \frac{\sum (x_i - \= x)^2}{n} }

         \sigma =  \sqrt{ \frac{ ( 20- 19 )^2 + ( 18- 19 )^2 +( 17- 19 )^2 +( 22- 19 )^2 +( 18- 19 )^2 }{5} }

         \sigma = 2

Now the confidence level is given as  90 %  hence the level of significance can be evaluated as

         \alpha = 100 - 90

        \alpha = 10%

         \alpha =0.10

Now the null hypothesis is  

         H_o  : \mu  =  21

the Alternative  hypothesis is  

           H_a  :  \mu<   21

The  standard error of mean is mathematically evaluated as

         \sigma_{\= x} =   \frac{\sigma}{ \sqrt{n} }

substituting values

         \sigma_{\= x} =   \frac{2}{ \sqrt{5 } }

        \sigma_{\= x} =   0.8944

The test statistic is  evaluated as  

              t =  \frac{\= x - \mu }{ \frac{\sigma }{\sqrt{n} } }

substituting values

              t =  \frac{ 19  - 21 }{ 0.8944 }

              t = -2.236

The  critical value of the level of significance is  obtained from the critical value table for z values as  

                   z_{0.10} =  1.28

Looking at the obtained value we see that z_{0.10} is greater than the test statistics value so the null hypothesis is rejected

6 0
3 years ago
A circle is divided into 8 sectors. Each sector has an area of approximately 5 square inches. What is the approximate area of th
vovikov84 [41]
Answer: 8×5 =40
B. 40 square inches
8 0
3 years ago
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