Distance in simplest radical form is 13
Or root 169
Answer: x = 20.
Step-by-step explanation:
x and (3x + 10) combine to form a right angle, shown in the diagram by the small square joining the perpendicular lines.
Right angles are 90 degrees, so you can add both angles to get 90:

You solve by with by altitude! Hope it helps
[tex]4 - (x + 20 ) = 16
x=0