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klasskru [66]
4 years ago
10

An airplane travels 2004 km against the wind in 3 hours and 2544 km with the wind in the same amount of time. What is the rate o

f the plane in still air and what is the rate of the wind in km/h?
Mathematics
1 answer:
Makovka662 [10]4 years ago
6 0
<span>An airplane travels 2004 km against the wind in 3 hours.
 
Thus, speed = 2004/3 = 668 km/hr ,

and

</span>An airplane travels 2544 km against the wind in 3 hours.
 
Thus, speed = 2544/3 = 848 km/hr

The speed of the plane in still air = (848 + 668 )/2
                                       = 758 km/hr
Thus, the speed of wind is 848 - 758 = 90 km/hr
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I hope this helps you

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Answer:

125°

Step-by-step explanation:

A triangle is 180°.  You already have 2 angle measures given.

30° + 25° = 55° 180° - 55° = 125°

Angle y is an obtuse angle, an angle measure greater than 90°.

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Solve for x: −2x − 4 &gt; 8
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-2x - 4 > 8...add 4 to both sides
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7 0
3 years ago
Which geometric series diverges? Three-fifths three-tenths three-twentieths StartFraction 3 Over 40 EndFraction ellipsis Negativ
Sholpan [36]

The geometric series which diverges is shown in the option number c as the absolute value of the common ratio of this series 4.

\sum_{n=1 }^{\infty} \dfrac{2}{3}(-4)^{n-1}

<h3>What is geometric series diverges? </h3>

Geometric sequence is the sequence in which the next term is obtained by multiplying the previous term with the same number for the whole series.

It can be given as,

a+ar+ ar^2+ ar^3+...

Here,

is the (<em>a</em>) first term of the sequence, and (<em>r</em>) is the common ratio.

To be a series as geometric series diverges, it should follow,

|r| > 1

First option given as,

3/5+3/10+3/20+3/40+ ...

Here, the common ratio is,

r=\dfrac{\dfrac{3}{10}}{\dfrac{3}{5}}\\r=\dfrac{1}{2}

The common ratio is less than one. Thus option a is not correct.

First option given as,

-10+4-8/4+18/25- ...

Here, the common ratio is,

r=\dfrac{4}{-10}\\r=\dfrac{-2}{5}

For the option number two the common ratio is (-2/5) which is less than 1. This option is also not correct.

In the option number c, the value of common ratio is -4. The absolute value of common ratio is,

|r|=|-4|\\|r|=4

The absolute value of this common ratio is more than one. Thus, this is the correct option.

The geometric series which diverges is shown in the option number c as the absolute value of the common ratio of this series 4.

\sum_{n=1 }^{\infty} \dfrac{2}{3}(-4)^{n-1}

Learn more about the geometric sequence here;

brainly.com/question/1509142

7 0
3 years ago
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