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3 years ago

8

Danny says 7 and -7 are different numbers. Mae says 7 and -7 are both equal 0. Luis says 7 and -7 are the same number. akik says

7 and -7 combine to make 0. who is correct? Use mathematics to justify your choice of who is correct.

1 answer:

yaroslaw [1]3 years ago

5 0

Answer:

Akik is correct. -7+7=0.

Step-by-step explanation:

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A rectangular plot of land has an area of 8.3 square miles and a length of 3.5 miles what is the width of the plot land, in mile

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18.55 Hope this help that will be your answer have a good day or night.

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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

Simplify 2(x + 6) - 8

Kruka [31]

Answer:

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Step-by-step explanation:

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There are 9.88 grams of sugar in 4 servings of grapes. How many grams of sugar are in a single serving of grapes?

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3 years ago

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bija089 [108]

Answer:

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Step-by-step explanation:

${ \boxed{ \bf{antilog \: of \: x = \frac{x}{ log} = {10}^{x} }}}$

Therefore:

${ \sf{anti(547.840) = {10}^{547.840} }} \\ { \tt{ \red{math \: error \: !}}}$

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