2 years ago

What is the center of the circle represented by this equation? x2 + (y + 9)2 = 25

Mathematics

1 answer:

Pepsi [2]2 years ago

3 0

(0,-9). What makes x zero and what makes y zero

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Use the unit circle to evaluate the followingHow do I solve this problem?

Ilya [14]

Notice that:

$\cos (\frac{4\pi}{3})=\cos (\pi+\frac{\pi}{3})\text{.}$

Recall that:

$\cos (\pi+x)=-\cos (x)\text{.}$

Therefore:

$\cos (\frac{4\pi}{3})=-\cos (\frac{\pi}{3})=-\frac{1}{2}\text{.}$

Answer:

$cos(\frac{4\pi}{3})=-\frac{1}{2}\text{.}$

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Keaton's dinner bill at a local restaurant before tax and tip was $25.85 if he wants to leave 15% of the bill for tip and there'

Ksju [112]

Bill = $25.85

Tips = 15% x $25.85 = $3.88

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Answer: He will spend $31.35 in total.
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