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saveliy_v [14]
2 years ago
14

A=pi r^2 which if the following equations can be used to solve for the radius (r)

Mathematics
1 answer:
zhannawk [14.2K]2 years ago
4 0
C. You would first have to divide A by Pi, then take the square root of r, in order to get r by itself.
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Answer:

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You solve a linear equation by putting the variable on one side of the equal sign and a constant on the other side. Here, variables and constants are on both sides of the equal sign, so you need to separate them.

The basic idea is that you add the opposite of any term you don't want. Whenever you perform any operation (like "add"), <em>you must do it to both sides of the equation</em>.

We observe that x-terms have coefficients of 10 and 9. We choose to add the opposite of 9x to both sides:

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The solution is x = 7.

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<em>Additional comment</em>

If we were to end up with an x-coefficient other than 1, we would divide both sides of the equation by that coefficient. This will leave the x-term with a coefficient of 1.

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