Answer:
Step-by-step explanation:
since ST and TU make up SU, you just have to add their values to get the value of SU, 8+12=20
SU = 20
If ST = 8, and TU = 12, add those two segments together since they are connected.
I hope this helps!
16p
8x + 6
This is actually the correct answer after I solved it continuously