A line intersects the x-axis at point B and passes through point A on the circle with the equation $x^2+y^2 = 16$. If this line is also tangent to another circle with the equation $(x-10)^2+y^2 = r^2$ where r=4, what is the y-coordinate of point A?
Added by Sarah P.
Step 1
Since point A lies on the circle, its coordinates \((x_A, y_A)\) must satisfy the equation \(x_A^2 + y_A^2 = 16\). Show more…
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