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3 years ago

Can you help me with this question? I am having difficulty identifying Terms

Mathematics

1 answer:

melomori [17]3 years ago

3 0

Theres no question here

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Negative 1.5 (4 minus r) = negative 12

umka2103 [35]

Answer:

r = - 4

Step-by-step explanation:

Given

- 1.5(4 - r) = - 12 ( divide both sides by - 1.5 )

4 - r = 8 ( subtract 4 from both sides )

- r = 4 ( multiply both sides by - 1 )

r = - 4

3 0

3 years ago

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I am so done with this fracking app. Every question I posted got a nonsense answer so before you leave this question can you dro

pantera1 [17]

Answer:I can’t disagree less...

Step-by-step explanation:

5 0

2 years ago

What is the area of the polygon given below

Nataliya [291]

I think the answer is D

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2 years ago

We wish to give a 90% confidence interval for the mean value of a normally distributed random variable. We obtain a simple rando

coldgirl [10]

Answer: $(9.27025,\ 11.12975)$

Step-by-step explanation:

Given : Sample size : n= 9

Degree of freedom = df =n-1 =8

Sample mean : $\overline{x}=10.2$

sample standard deviation : $s= 1.5$

Significance level ; $\alpha= 1-0.90=0.10$

Since population standard deviation is not given , so we use t- test.

Using t-distribution table , we have

Critical value = $t_{\alpha/2, df}=t_{0.05 , 8}=1.8595$

Confidence interval for the population mean :

$\overline{x}\pm t_{\alpha/2, df}\dfrac{s}{\sqrt{n}}$

90% confidence interval for the mean value will be :

$10.2\pm (1.8595)\dfrac{1.5}{\sqrt{9}}$

$10.2\pm (1.8595)\dfrac{1.5}{3}$

$10.2\pm (1.8595)(0.5)$

$10.2\pm (0.92975)$

$(10.2-0.92975,\ 10.2+0.92975)$

$(9.27025,\ 11.12975)$

Hence, the 90% confidence interval for the mean value= $(9.27025,\ 11.12975)$

6 0

3 years ago

Solve, correct people get brainliest

Zigmanuir [339]

Solution:

5t - 8 + 68 = 180

<u>Use the equation above to solve for t.</u>

5t - 8 + 68 = 180
=> 5t + 60 = 180
=> 5t = 180 - 60
=> 5t = 120
=> t = 120/5 = 24

The value of t is 24.

7 0

2 years ago

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