honchos wrote:

The two perpendicular lines L and R intersect at the point (3, 4) on the coordinate plane to form a triangle whose other two vertices rest on the x-axis. If one of the other two vertices is located at the origin, what is the x-coordinate of the other vertex?

A. 11/8

B. 33/8

C. 5

D. 20/3

E. 25/3

Another approach to this problem is

By property of right angled triangle BD^2 = AD * DC

4^2 = 3 * DC

DC = 16/3

AC = AD + DC = 3+16/3 = 25/3

Answer E
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