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3 years ago

Pythagorean theorem question:)

Mathematics

1 answer:

AURORKA [14]3 years ago

4 0

11^2 + 9^2 = x^2
121 + 81 = x^2
202 = x^2
14.21 = x

The answer is 14.21

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The perimeter of a square table is 12x,+4. what is the length of one side of the table

quester [9]

3x + 1 is the length for one side. Do you also need to solve for x?

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3 years ago

Please Help! Brainliest Answer!

Alla [95]

Answer:

Step-by-step explanation:

Using sine rule

a/sin A ＝b/sin B

8/sin90° ＝ x/sin60°

8 * sin60° ＝ x

x ＝

$4 \sqrt{3}$

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3 years ago

Explain how can 9×1/4=2 1/2

Art [367]

It can't. 9 x 1/4 = 2 and 1/4. The equation in the question is a false statement.

8 0

3 years ago

There were 324 adults surveyed. Among the participants, the mean number of hours of sleep each night was 7. 5 and the standard d

NeTakaya

The margin of error for 324 adults surveyed with 1.6 standard deviations is 0.1742.

<h3>What is the margin of error?</h3>

The margin of error can be defined as the amount of random sampling error in the results of a survey. It is given by the formula,

$\text{MOE}_{\gamma}=z_{\gamma} \times \sqrt{\frac{\sigma^{2}}{n}}$

$\text{MOE}$ = margin of error

$\gamma$ = confidence level

$z_{\gamma}$ = quantile

σ = standard deviation

n = sample size

As it is given that the sample size of the survey is 324, while the standard deviation of the survey is 1.6.

We know that the value of the z for 95% confidence interval is 1.96. Therefore, using the formula of the standard of error we can write it as,

$\text{MOE}_{\gamma}=z_{\gamma} \times \sqrt{\dfrac{\sigma^{2}}{n}}\\\\\text{MOE}_{\gamma}=1.96 \times \sqrt{\dfrac{1.6^{2}}{324}}\\\\\text{MOE}_{\gamma}=0.1742$

Hence, the margin of error for 324 adults surveyed with 1.6 standard deviations is 0.1742.

Learn more about Margin of Error:

brainly.com/question/6979326

5 0

3 years ago

1. Four cards are drawn at random without replacement from a standard deck of 52 cards. Compute the probability that all are of

OLga [1]

Answer:

1) 10.55%

2) 30.77%

Step-by-step explanation:

52/52•39/51•26/50•13/49 = 0.105498... ≈ 10.55%

100% chance you draw a unique card on the first draw

51 cards left of which 13(3) = 39 are unique suit for your second draw

50 cards left of which 13(2) = 26 are unique suit for your third draw

49 cards left of which 13(1) = 13 are unique suit for your forth draw.

Two balls are already green

Leaves 4 red balls in a field of 13 balls

4/13 = 0.307692... ≈ 30.77%

3 0

3 years ago