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Valentin [98]
3 years ago
9

Please help me !!!!

Mathematics
1 answer:
liq [111]3 years ago
8 0

Answer:

...

against the wind, an airplane travels 3640 km in 7 hours.

with the wind, the same plane travels 6000 km in 6hrs.

...

let speed of plane in still air be x mph

speed of wind be y mph.

..

t=d/r

..

against wind speed = x-y mph

with wond speed = x=y mph

...

3640/(x-y)=7

3640 = 7x-7y

/7

520=x-y.....................1

...

6000/x+y = 6

6000 = 6x+6y

/6

1000=x+y.....................2

...

Add (1) & (2)

2x=1520

/2

x=760 mph speed of plane in still air

...

plug value of x in 2

1000=760+y

100-760=y

240 = y

240 mph speed of wind

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Answer:

D. 105

Step-by-step explanation:

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270-100 of one head, is 170 purple one head. 170+125 purple equals 295.

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2 years ago
Suppose that the function g is defined, for all real numbers, as follows.
lesantik [10]
<h3>Answers:</h3>
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======================================

Explanation:

The piecewise function g(x) is defined based on what the input is.

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---------------

In the case of g(-1), we have x = -1 which makes -2 \le x < 1 true.

So we'll use the second piece

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----------------

For g(1), we have x = 1 which makes x \ge 1 true

We'll use the third piece

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-----------------

For g(5), we have x = 5 which makes x \ge 1 true

g(x) = (-1/2)x-1

g(5) = (-1/2)*5-1

g(5) = -5/2 - 1

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