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3 years ago

Find the value of x pls thank you for helping me !!!!!

Mathematics

1 answer:

Klio2033 [76]3 years ago

3 0

The answer to the question is $x=237$

all angle degrees of a triangle will add to 360°

Knowing this, first you must add the two degrees you already know

67°+56°=123°

Then, you must subtract 123° by° 360 to find $x$

360° - 123° = 237°

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High-power experimental engines are being developed by the Stevens Motor Company for use in its new sports coupe. The engineers

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Answer:

The 99% of a confidence interval for the average maximum HP for the experimental engine.

(536.46, 603.54)

Step-by-step explanation:

Step:-1

Given that the mean of the Population = 540HP

Given that the size of the sample 'n' = 9

Given that the mean of the sample = 570HP

Given that the sample standard deviation = 30HP

Step(ii):-

Degrees of freedom = n-1 =9-1 =8

t₀.₀₀₅ = 3.3554

The 99% of a confidence interval for the average maximum HP for the experimental engine.

$(x^{-} - t_{\frac{0.01}{2} ,8} \frac{S.D}{\sqrt{n} } ,x^{2} + t_{\frac{0.01}{2},8 } \frac{S.D}{\sqrt{n} } )$

$(570-3.354\frac{30}{\sqrt{9} } , 570+3.354\frac{30}{\sqrt{9} } )$

(570 - 33.54 , 570+33.54)

(536.46 , 603.54)

Final answer :-

The 99% of a confidence interval for the average maximum HP for the experimental engine.

(536.46, 603.54)

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