Aplane can travel 640 miles against the wind in the same time it can travel 800 miles with the wind. if the plane can fly 180 mph in calm air, what is the speed of the wind? 10 mph 15 mph 20 mph

20 mph

Step-by-step explanation:

Let the speed of the wind be x

Speed of the plane is 180 mph

When plane flew with wind , Speed = (180+x)

When plane flew against the wind , Speed=(180-x)

Since we are given that A plane can travel 640 miles against the wind .

 --A

It can travel 800 miles with the wind.

--B

Now we are given that the plane travels with the same time in both cases.

So, equation A = equation B

Hence the speed of the wind is 20 mph

answer: can and shows the work

step-by-step explanation:

answer

see attachment

explanation

the given function is

this function has y-intercept at

-4 and a slope of 2.

note that, the graph has a positive slope.

the graph that represents this function is the straight line that moves upward from left to right.

the graph touches the y-axis at -4.

the correct choice is the graph shown in the attachment.