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3 years ago

A bird leaves its nest and travels 20 miles per hour downwind for

Mathematics

2 answers:

Nataly_w [17]3 years ago

6 0

On the return trip: 16 mph * 3/2 hr = 24 miles, which is 6 miles short of 30 mi.

The distance is 30 miles.

The bird flies all 30 miles in 3/2 hr = 1 and 1/2 hour = 1 hour 30 minutes.

On the return trip, the bird flies 24 miles in 1.5 hours, which is 6 miles short.

lys-0071 [83]3 years ago

5 0

Find the value of x, and the miles for it

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A textbook has 428 pages numbered in order starting with 1. You flip to a random page in the book in a way that it is equally li

iVinArrow [24]

Answer:

The set of all pages in the book:

S={1, 2, 3, ..., 428}

Step-by-step explanation:

The sample space is the set containing all possible outcomes for the experiment. In this problem, the experiment is stopping at a random page of the textbook, and the sample space is the set of all pages in the book:

S={1, 2, 3, ..., 428}.

4 0

3 years ago

Find the equation of a line that has the same slope ask why equals 10-4x and the same Y intercept is why equals -9x-8

Alborosie

Answer:

$y=-4x-8$

Step-by-step explanation:

we know that

The equation of the line in slope intercept form is equal to

$y=mx+b$

where

m is the slope

b is the y-intercept

1) Find the slope of the given line $y=10-4x$

The slope is $m=-4$

2) Find the y-intercept of the given line $y=-9x-8$

The y-intercept is $b=-8$

therefore

The equation of the line with

$m=-4$

$b=-8$

is equal to

$y=-4x-8$

3 0

3 years ago

A sample of 20 pages was taken from a Yellow Pages directory. On each page, the mean area devoted to display ads was measured in

Snezhnost [94]

The 95 percent confidence interval for the mean is (266.76,426.24).

A confidence interval is how much uncertainty there is with any particular statistic. Confidence intervals are often used with a margin of error. It tells you how confident you can be that the results from a poll or survey reflect what you would expect to find if it were possible to survey the entire population. Confidence intervals are intrinsically connected to confidence levels.

The formula of Confidence Interval = Mean ± $t\frac{Standard Deviation}{\sqrt{number of observations} }$