Since arc ST = 170 and arc QR = 110
Then the sum of arcs TR and SQ = 360 - 170 - 110 = 80
Measure of P = (1/2)(arc TR - arc SQ)
30 = (1/2) (arc TR - arc SQ) multiply both sides by 2
60 = arc TR - arc SQ
So we have these equations
arc TR + arc SQ = 80
arc TR - arc SQ = 60 add these
2arc TR = 140 divide both sides by 2
arc TR = 70°
Now you can change the question to a whole new one or delete it altogether. Like you have done before.
You cheating little drop kick.