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Illusion [34]
2 years ago
9

Evaluate 9(-2) What’s the answer for this

Mathematics
1 answer:
34kurt2 years ago
3 0

Answer:

-18

Step-by-step explanation:

just multiply 9 and -2, and you'll get -18

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The time needed for all college students to complete a certain paper-and-pencil maze follows a normal distribution with a popula
oee [108]

Answer:

The correct option is a

Step-by-step explanation:

From the question we are told that

   The population mean is  \mu = 30\ seconds

    The standard deviation is  \sigma = 3 \ seconds

     The sample size is  n  = 9

    The null hypothesis is H_o: \mu  = 30

     The alternative hypothesis is  H_a  :  \mu \ne 30

    The level of significance is  \alpha = 0.01

    The sample mean is  \= x = 31.2

Generally the test statistics is mathematically represented as

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

=>   z = \frac{ 31.2 - 30}{ \frac{3}{\sqrt{9} } }

=>   z = 1.2

From the z table  the area under the normal curve to the right corresponding to  1.2  is    

         P(Z >  1.2) =  0.11507

Generally the p-value is mathematically represented as

         p-value = 2 * P(Z >  1.2)

=>       p-value = 2 *0.11507

=>       p-value = 0.230

From the value obtained w can see that

         p-value  > \alpha hence

The decision rule is  

Fail to reject the null hypothesis

The conclusion is there is not enough evidence to support the claim

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3 years ago
Each student earns 3/4 point for every bonus question. If a student gets 6 bonus points, how many bonus questions did a student
klio [65]

Answer:

8

Step-by-step explanation:

6 divided by.75 if u think I'm wrong check and correct me

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2 years ago
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A ton weighs 2000 pounds, so if you were to take 6 tons, it will be 12000 pounds. 
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Can someone help me with the meaning of percent
LekaFEV [45]

69 out of 100 would be 69/100 = 0.69 = 69% were answered correctly

100% - 69% = 100-69 = 31 = 31%  = 31/100 were incorrect

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gavin's unpaid credit card balance is $2103.23 his APR is 14.4% what is his new balance if he made one new transaction for $390?
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Ummmmmmm let me think it 3765
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