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2 years ago

7

An arc of a circle is 3πm long, and it subtends an angle of 72° at the center of the circle. Find the radius of the circle.

1 answer:

Artist 52 [7]2 years ago

7 0

Answer:

7.5 m

Step-by-step explanation:

circumference = 360/72 × 3π = 15π

so the radius of the circle =

15π / 2π = 7.5 m

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Add and simplify

Tanya [424]

Answer:

Your 1st answer is correct

Step-by-step explanation:

$\frac{1}{(x - 1)} - \frac{3}{(1 - x)} + 2$

$\frac{1}{(x - 1)} - \frac{3}{ - (x - 1)} + 2$

$\frac{1}{(x - 1)} + \frac{3}{(x - 1)} + 2$

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$= \frac{2(x + 1)}{x - 1}$

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2 years ago

Express each rational number as a fraction or mixed number in simplest form. <img src="https://tex.z-dn.net/?f=%5Csqrt%7B25%7D"

siniylev [52]

Answer:

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Step-by-step explanation:

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2 years ago

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PIT_PIT [208]

In the smaller triangle, let $y$ be the length of the smallest leg. Then the smallest leg in the larger triangle is $14-y$ .

Within the scope of the smaller triangle, we have $y$ such that

$x^2+y^2=13^2\implies y=\sqrt{13^2-x^2}$

Then within the larger the triangle, we would have

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Now we can solve for $x$ :

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3 years ago

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Step-by-step explanation:

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pochemuha

Answer:

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Step-by-step explanation:

Please find the complete question in the attached file.

$\text{test statistic t} = \frac{slope}{standard \ error}$

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2 years ago