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Grace [21]
3 years ago
11

What's the circumference of a circle with a radius of 7 in? Round your answer to the nearest inch. A. 41 in. B. 44 in. C. 21 in.

D. 14 in.
Mathematics
1 answer:
Simora [160]3 years ago
4 0

\bf \textit{circumference of a circle}\\\\ C=2\pi r~~ \begin{cases} r=radius\\ \cline{1-1} r= 7 \end{cases}\implies C=2\pi (7)\implies C=14\pi \implies \stackrel{\textit{rounded up}}{C=44}

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8. The sum of two numbers is 8 less than twice the first number. Their difference is 4 less than twice
Delicious77 [7]

Answer:

14 and 6

Step-by-step explanation:

Let's start by naming the first number x.

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Let's simplify the equations.

x+y=2x-8

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Subtract 2y from both sides.

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Add the two equations together to eliminate x.

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Plug that back in.

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3 years ago
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Now that you have the slope (-9/4) and a point (4, 3), you can use the point-slope formula to find the equation.
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So the answer will be:
C. <span>y= -(9/4)x+12</span>
3 0
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