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3 years ago

PLEASE HELPPPPP ITS URGENT!

Mathematics

1 answer:

Afina-wow [57]3 years ago

5 0

Answer:

x = 3.5

Step-by-step explanation:

Triangle ACD and triangle CDB are similar.

So, they are proportional in dimensions to each other.

Now,

( x / 5 ) = ( 4.2 / 6 )

x = 3.5

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Solve for x 4 (æ – 6) = 8

iogann1982 [59]

Answer:

8im thinking

Step-by-step explanation:

but is ae the x?

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Nielsen ratings are based on televisions in 50005000 households. Nielsen estimates that 12 comma 00012,000 people live in these

avanturin [10]

Answer:

We are 95% confident that the true proportion of TV audience is between 65.15% and 65.85%

Step-by-step explanation:

-From the given information, $\hat p=0.65$ .

-We calculate the confidence interval using this value at 95% confidence level:

$CI=\hat p\pm z \sqrt{\frac{\hat p(1-\hat p)}{n}}\\\\\\=0.65\pm 1.96\times \sqrt{\frac{0.65\times 0.35}{12000}}\\\\\\=0.65\pm 0.0085\\\\\\=[0.6415,0.6585]$

So, the 95% confidence interval is (0.6515,0.6585).

Hence, we are 95% confident that the true proportion of TV audience is between 65.15% and 65.85%.

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3 years ago

HELP HELP HELP HELP HELP HELP!!!!!

sesenic [268]

Answer:

Step-by-step explanation:

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3 years ago

What is the slope of the line shown in the graph? A 3/2 B) 2/3 C) -3/4 D) -2/3

garik1379 [7]

Answer:

Step-by-step explanation:

y-intercept is (0, 3)

x-intercept is (4.5, 0)

formula to find the slope from two points is

$slope = m = \frac{y2 - y1}{x2 - x1} = \frac{y1 - y2}{x1 - x2} \\$

then the slope of the line that crosses (0, 3) & (4.5, 0) is

$m = \frac{3 - 0}{0 - 4.5} = \frac{3}{ - 4.5} = - \frac{3}{ \frac{9}{2} } = - \frac{2}{3}$

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3 years ago

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The sum of a students three scores is 217. If the first is 30 points more than the the second, and the sum of the first two is 1

nekit [7.7K]

Answer:

First score is 90

Step-by-step explanation:

Let A represent the first score

Let B represent the second score

Let C represent the third score

A+B+C=217 equation 1

If the first score A is 30 points more than the second,B

A=B-30 equation 2

Lastly,sum of A&B is 16 more than 2C

A+B=2C+16 equation 3

From equation 1

A+B=217-C equation 4

substitute for A+B in equation 3

217-C=2C+16

217-16=2C+C

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substituting C in equation 4

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if the first score more than the first,then the first 90 while second 60 since A+B=150

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