Answer:
7z + 84
Step-by-step explanation:
Multiply 7 times z and 12
7z +84
7 x z = 7z then you do 7 x 12 = 84
.
DC = 16 and
DB = 30 so
CB = 14
DB = 30 and
EB = 49 so
EB = 19
I hope I helped you^_^