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stira [4]
2 years ago
11

5x+2>20 in inequalities ?​

Mathematics
2 answers:
Maru [420]2 years ago
7 0

Answer:

x > \frac{18}{5}

Step-by-step explanation:

5x + 2 > 20 ( subtract 2 from both sides )

5x > 18 ( divide both sides by 5 )

x > \frac{18}{5} or x > 3.6

seropon [69]2 years ago
6 0

Answer: x>\frac{18}{5}

Step-by-step explanation:

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Vincent flipped three coins during a probability experiment. The outcomes of the first 40 trials are shown in the table
mafiozo [28]

Answer:

Step-by-step explanation:

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3 years ago
Ivanova has a healthcare plan with $25 co-pays to see doctors, $10 co-pays for prescription drugs, and an annual deductible of $
RSB [31]

Answer:

A. $1842

Step-by-step explanation:


8 0
3 years ago
Read 2 more answers
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
What number is 60% of 98
Shkiper50 [21]

Answer:

The number is 58.8

Step-by-step explanation:

Let

x -----> the number

we know that

The number 98 represent the 100%

so

using proportion

Find out what number represent the 60% of 98

\frac{98}{100\%}=\frac{x}{60\%}\\\\x=98(60\%)/100\%\\\\x=58.8

7 0
3 years ago
Solve for y in the equation -y+9=23
timurjin [86]

Answer:

y=-14

Step-by-step explanation:

-y+9=23

-y=14

y=-14

7 0
3 years ago
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