2 years ago

Pls help lolololololololoolol

Mathematics

1 answer:

Phantasy [73]2 years ago

5 0

Answer:5,5

Step-by-step explanation:

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2 years ago

Solve for x <br> -4(5 - x) = (x + 7)

garik1379 [7]

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3 years ago

Suppose that prior to conducting a coin-flipping experiment, we suspect that the coin is fair. How many times would we have to f

STALIN [3.7K]

Answer: b) 84

Step-by-step explanation:

Let p be the prior estimate of the required proportion.

As per given , we have

p =0.5 (The probability of getting heads on a fair coin is 0.5)

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

Critical z-value (using z-value table ) : $z_{\alpha/2}=1.645$

Confidence interval width : w= 0.18

Thus , the margin of error : $E=\dfrac{w}{2}=0.09$

Formula to find the sample size ( if prior estimate of proportion is known.):-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

Substitute the values , we get

$n=0.5(1-0.5)(\dfrac{1.645}{0.09})^2$

Simplify ,

$n=83.5192901235\approx84$ [Round of to the next whole number.]

Hence, the number of times we would have to flip the coin =<u>84</u>

hence, the correct answer is b) 84

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3 years ago

The graph shows the motion of two cars starting at different places on a highway. Their speeds can be compared by comparing the

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Answer:the dot goes in in the blue line in 0 and 150 just like the blue line

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Which graph shows the solution to the inequality -3x-7 < 20?

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