Question

Find all points having a y-coordinate of 5 (x, 5) whose distance from the point (10,-11) is 20.

Answer 1

Step 1

state the equation of a circle

`(x-h)^2+(y-k)^2=r^2`

where;

`(h,k)\text{ is the center of the circle and r is the radius of the circle}`

The center of the circle is(10,-11). The radius of the circle is 20. We are only concerned with points on the circle that has a y-coordinate of 5.

Step 2

The equation now becomes;