The first option, on the top left!
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Let's solve this equation using simple algebra,
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Definitions </h2>
Algebra<em> - Algebra is one of the broad areas of mathematics. Roughly speaking, algebra is the study of mathematical symbols and the rules for manipulating these symbols in formulas; it is a unifying thread of almost all mathematics</em>
Division <em>- Division, otherwise known as the inverse of multiplication separates a certain number into what it has been divided by.</em>
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Now that we understand the definition we can further solve this equation

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Now we will add to solve this equation


-Use simple division

This is repeating*

The answer is
repeating
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Answer:
Radius = 2.
Step-by-step explanation:
We have been given equation of the circle which is
.
Now we need to find the radius of the given circle
.
To find that let's compare with the formula of the circle with standard equation of the circle
, where r is the radius.
We get 
take square root of both sides.

Hence radius of the given circle is r = 2.
Answer:
Step-by-step explanation:
no
no
yes
no
no