Answer:
51
Step-by-step explanation:
The two tangent lines can be set equal to each other
10x - 19 = 4x + 23
Solve for x
-4x -4x
6x - 19 = 23
+19 +19
6x = 42
6 6
x = 7
Plug in x and solve for FE
10x - 19 = 10(7)-19 = 51
