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slavikrds [6]
3 years ago
15

Find the size of the final unknown exterior angle in a polygon whose other exterior angles are:

Mathematics
1 answer:
soldi70 [24.7K]3 years ago
6 0

Answer:

=72

Step-by-step explanation:

57+68+32+59+72=288

360-288=72

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A train leaves boston and travels toward its destination at a speed of 60 mph. One hour later, an express train leaves Boston an
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Taking into account the supplied speeds, Boston is from the destination to:

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<h3>Calculation of the distance between Boston and Place of Destination</h3>

To identify the distance between Boston and the destination of the trains, it must be remembered that the <u>speed</u> mentioned for each one is a reference to the distance traveled per hour, therefore, after each hour, each train will travel :

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  • Express train: 80 miles

According to the information given, when the express train leaves, the regular train has a 60-mile lead, which is getting shorter hour by hour because the express train travels 20 miles per hour more than the normal train.

Therefore, in <u>three hours</u>, the express train would catch up with the regular train, calculating the distance thanks to the speed formula:

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And clearing the distance:

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Therefore, the destination would be <u>240 miles</u> from Boston, which would take four hours by regular train and three hours by express train.

If you want to learn more about Mathematics, you can visit the following link: brainly.com/question/24600056

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