2 years ago

Please help I will mark brainliest

1 answer:

6 0

5 is congruent to 4 : Vertical Angle Theorem

7 is congruent to 3 : Corresponding Angles

4 is congruent to 1 : Alternate Interior Angle Theorem

-i have geometry too!!

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A researcher wishes to estimate the proportion of X-ray machines that malfunction. A random 275 sample of machines is taken, and

Dominik [7]

Answer:

Following are the solution to the given question:

Step-by-step explanation:

$95\%$ Confidence Interval for both the percentage of all x-ray machines

p = the machinery's share is not working:

$= \frac{228}{275}\\\\ = 0.829$

$\text{Margin of Error} = Z_{(\frac{\alpha}{2})} \times \sqrt{( p \times (1-p)}{n})$

$= 1.96 \times \sqrt{(0.829 \times \frac{0.171}{275})} \\\\= 1.96 \times 0.023 \\\\= 0.045$

Lower $95\%$ Confidence interval = p - error margin $= 0.829 - 0.045 = 0.784$

Upper $95\%$ Confidence Interval = p + error margin $= 0.829 + 0.045 = 0.874$

So, $95\%$ Confidence Interval $= ( 0.78 , 0.87 )$

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2 years ago

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Sunny_sXe [5.5K]

Answer:

5.4 is rational. 5.4 divide by 2 is 2.45 5.3 and 5 3 are irrational, as it cant be divided easily

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2 years ago

How do I rotate a point by 180 degrees clockwise?

gizmo_the_mogwai [7]

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2 years ago

Express (x+9)^2 as a trinomial in standard form.

Andreyy89

Answer:

x^2 + 18x + 81

Step-by-step explanation:

(x+9) (x+9)

then distributive property

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1 year ago

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Write this number in standards form.12 ten thousands,14 hundreds,7 ones

Reptile [31]

12,147 is the answer

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