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AlexFokin [52]
2 years ago
8

Consider the equation of the circle.

Mathematics
1 answer:
NeTakaya2 years ago
8 0

Answer:

<h2>radius = 8</h2>

Step-by-step explanation:

NOTE ================================

EQUATION OF A CIRCLE with center (a , b) and radius r :

(x - a)² + (y-b)² = r²

……………………………………………

x² − 14x + y² = 15

⇔ x² − 2×7x + 7² − 7² + y² = 15

⇔ x² − 2×7x + 49 − 49 + y² = 15

⇔ (x - 7)² − 49 + y² = 15

⇔ (x - 7)² + y² = 15 + 49

⇔ (x - 7)² + y² = 64

⇔ (x - 7)² + y² = 8²

Then radius of the circle is 8.

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A motor boat travels 60 miles down a river in three hours but takes five hours to return upstream. Find the rate of the boat in
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4 years ago
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Step-by-step explanation:

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