An Airbus A320 jet flies 5 hours west with a 40-mph tailwind. Returning against the wind takes 7 hours. Find the speed of the jet with no wind.

The speed of the jet with no wind is 240 miles per hour.

Step-by-step explanation:

The speed of the jet with no wind is equivalent to the speed of the jet relative to wind. Physically speaking, we have the following system of linear equations under the assumption that both speeds of wind and jet are constant:

In favor of wind

(1)

Against wind

(2)

Where:

- Travelled distance, measured in miles.

, - Time, measured in hours.

- Wind speed, measured in miles per hour.

- Jet speed relative to wind, measured in miles per hour.

If we know that , , , then the speed of the jet with no wind is:

(3)

(4)

From (3), we find that speed of the jet with no wind is:

The speed of the jet with no wind is 240 miles per hour.

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step-by-step explanation:

because i said it is

5x + 5

step-by-step explanation:

you should always add the diagrams and graphs we cannot see. this particular question is kind of borderline because we can make a graph for you.

(f + g)x = -x^2 +3x + 5 + x^2 + 2x

(f + g)x = 5x + 5

the graph of z = 5x + 5 is shown below. always use desmos when in doubt.