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Scrat [10]
2 years ago
8

Is 4x + 8 = 2x + 7 + 2x - 20 a contradiction, identity, or neither?

Mathematics
2 answers:
leva [86]2 years ago
8 0

Answer:

yes, contradiction

Step-by-step explanation:

4x+8=2x+7+2x-20

4x+8=2x+2x+7-20

4x+8=4x-13

This equation is invalid the right and left.

Reika [66]2 years ago
4 0

•contradiction•

☆Good luck❤

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Flying against the wind, a jet travels 2190 miles in 3 hours. Flying with the wind, the same jet travels 9520 miles in 8 hours.
dezoksy [38]

Answer:

Velocity of jet in still air is 970 miles per hour and velocity of wind is 210 miles per hour.

Step-by-step explanation:

Jet's velocity against wind is

3040/4 = 760 miles per hour and flying with wind it is

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Let the velocity of jet in still air be x miles per hour and velocity of wind be y miles per hour.

As such its velocity against wind is x − y and with wind is x + y and therefore

x − y = 760 and x + y = 1180

Adding the two 2 x = 1940 and x = 970 and y = 1180 − 970 = 210

Hence velocity of jet in still air is 970 miles per hour and velocity of wind is

210 miles per hour.

Actual Answer:

https://socratic.org/questions/flying-against-the-wind-a-jet-travels-3040-miles-in-4-hours-flying-with-the-wind

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3 years ago
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