Answer:
2. is not an equation
Step-by-step explanation:
An equation always has an equal sign. An expression doesn't
Answer:(x+2)(x−2)
Step-by-step explanation:Since both terms are perfect squares, factor using the difference of squares formula
Answer:

Step-by-step explanation:
First let's find the radius of the quarter circle.

Now let's find the arc length of this quarter circle.

Now let's find the perimeter
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I think answer is b that is 10raise to 2