Answer:
QT=4x+1, SV = 9x-4
Explanation:
For QT:
1) segments RT and RV have the same length
2) segments QT and QV both start at point Q and end at opposite ends of segment TV which is perpendicular to segment QS
so the length of QV is equal to the length of QS
For SV:
1) segments RT and RV have the same length
2) segments ST and SV both start at point S and end at opposite ends of segment TV which is perpendicular to segment QS
so the length of SV is equal to the length of ST