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3 years ago

Subtract40(-32-40-25)please show how you will do that (step by step)

Mathematics

1 answer:

sergeinik [125]3 years ago

4 0

Answer:

-3880

Step-by-step explanation:

$40(-32-40-25)\\40(-72-25)\\40(-97)\\-3880$

Please give brainliest if this answer satisfies your question.

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The manager of a fleet of automobiles is testing two brands of radial tires and assigns one tire of each brand at random to the

Darya [45]

Answer:

Brand 1 Brand 2 Difference

37734 35202 2532

45299 41635 3664

36240 35500 740

32100 31950 150

37210 38015 −805

48360 47800 560

38200 37810 390

33500 33215 285

Sum of difference = 2532+ 3664+740+150 −805+ 560 +390 +285 = 7516

Mean = $d=\frac{7516}{8}$

Mean = $d=939.5$

a) d= 939.5

$\text{Sample Standard deviation, s} = \sqrt{\dfrac{(x-\bar{x})^2}{n-1}}$

$=\sqrt{\dfrac{(2532-939.5)^2+(3664-939.5)^2+(740-939.5)^2 ...+(285-939.5)^2}{8-1}}$

=1441.21

b)SD= 1441.21

c)Calculate a 99% two-sided confidence interval on the difference in mean life.

confidence level =99%

significance level =α= 0.01

Degree of freedom = n-1 = 8-1 =7

So, $t_{\frac{\alpha}{2}}=3.499$

Formula for confidence interval $= \left( \bar{X} \pm t_{\frac{\alpha}{2}} \times \frac{s}{\sqrt{n}} \right)$

Substitute the values

confidence interval $= 939.5 \pm 3.499 \times \frac{1441.21}{\sqrt{8}} \right)$

confidence interval $= 939.5 - 3.499 \times \frac{1441.21}{\sqrt{8}} \right)$ to $= 939.5 + 3.499 \times \frac{1441.21}{\sqrt{8}} \right)$

Confidence interval $−843.396\$ to $2722.396$

8 0

3 years ago

M = 2; b=3 using y-intercept how do i solve

mash [69]

The slope-intercept form:

$y=mx+b$

m - slope

b - y-intercept

We have m = 2 and b = 3. Substitute:

$y=2x+3$

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3 years ago

Can someone find loverboy444? thank you! who ever finds him will get a request!

lilavasa [31]

Answer:

I can try

Step-by-step explanation:

5 0

3 years ago

HELP WILL GIVE BRAINLIEST BUT MUST ANSWER ASAP

ser-zykov [4K]

Answer:a and point b

i hope i helped u

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

8_murik_8 [283]

Hey!

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Solution:

= -2.1 + 0.3 + -1.7 + -0.4

= -1.8 + -1.7 + -0.4

= -3.5 + -0.4

= -3.9

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Answer:

a) -3.9

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Hope This Helped! Good Luck!

5 0

3 years ago

Subtract40(-32-40-25)please show how you will do that (step by step)​

Subtract40(-32-40-25)please show how you will do that (step by step)