Answer:
See below
Step-by-step explanation:
SAS says the two triangles are congruent
so side 6x-4 = 3x+8 then x = 4
x= 4 true
x = 3 false ( because we just found it = 4)
Pythag theorem says QT
(6x-4)^2 = QT^2 + 12^2
( 6(4)-4)^2 = 12 ^2 + QT^2
400 -144 = QT^2
QT = 16 true
