If f(x) = _4x _ 1, find f(_2)
1 answer:
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Given:
The center of the circle = (-1,0)
Point on the circle = (2,-4).
To find:
The equation of the circle.
Solution:
Distance between two points is
Distance between the center (-1,0) and the point on the circle (2,-4) is the radius of the circle.
On further simplification, we get
Now, the equation of the circle is
Where, (h,k) is the center and r is the radius of the circle.
The radius of the circle is 5 and the center is at (-1,0), so the equation of the circle is
Therefore, the first option is correct, i.e., .
You will read for 45 minutes if your brother reads for 15 minutes.
<em><u>Explanation</u></em>
You decide to read 30 minutes longer than your brother reads.
If your brother reads number of minutes, then 30 minutes longer than
minutes means
minutes.
As the number of minutes you read is , so the equation will be:
When your brother reads for 15 minutes, then we will just <u>plug into the above equation</u>. So.....
So, you will read for 45 minutes if your brother reads for 15 minutes.