Math Challenge Problem No. 28

#mathchallenge problem no. 28 is on #circles under #precalculus. The problems reads Find the equation of the circle that is tangent to the line 5𝑥 −𝑦=3 at the point (2, 7), and the center is on the line x + 2y = 19. Remember when writing the equation of the circle in standard form, we need to identify the coordinates of the center, (h, k) and the length of the radius, r. In this problem, we used different concepts such as 1. Writing the equation of the line passing through a given point and that is perpendicular to a given line.    • Equation of the Line from a point parallel...   2. Solving systems of linear equation using elimination method, and 3. General formula for finding the distance between two points on a rectangular coordinate system. If you are new to this channel, please don't forge to like the video and subscribe. Thanks. Math is easy.