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3 years ago

9

Solve for x give answer as radicals (roots)

1 answer:

skelet666 [1.2K]3 years ago

8 0

Answer:

x = 15

Step-by-step explanation:

Use pythagorean theorem: $a^{2} +b^{2} = c^{2}$

$8^{2} +x^{2} =17^{2} \\ 64 + x^{2} = 289 \\\\x^{2} = 289 - 64\\x^{2} = 225\\x = 15$

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Answer:

The answer is: 13 minutes

Step-by-step explanation:

First Let us form equations with the statements in the two scenario

$time=\frac{distance}{speed}$

Let the time in which the bell rings be 'x'

1. If Andrew walks (50 meters/minute), he arrives 3 minutes after the bell rings. Therefore the time of arrival at this speed = (3 + x) minutes

$3 + x =\frac{distance}{50}\\distance = 50(3+x) - - - - - (1)$

2. If Andrew runs (80 meters/minute), he arrives 3 minutes before the bell rings. Therefore the time taken to travel the distance = (x - 3) minutes

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Next, collecting like terms:

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dividing both sides by 3:

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3 years ago