Answer:
D.
x= 18
RZ= 114
RT= 228
Step-by-step explanation:
- so if Z is the midpoint of RT then that means Z divided RT in half
- meaning RZ=ZT
- so you now know what RZ is because ZT=114
- and RT is just RZ+ZT so RT= 114+114 =228
the hard part is solving for x
- if RT=ZT then 7x–12=114
- start by adding 12 on both sides
- you get 7x=126
- then divide 7 on both sides
- you get x=18
