Answer:
x = 24
Step-by-step explanation:
Pythagorean Theorem: a² + b² = c²
Whenever a line is tangent to a circle, it creates a perpendicular bisector with the radius. Therefore, we can use Pythagorean Theorem:
PO = (18 + 7) = 25
x² + 7² = 25²
x² = 576
x = 24
