Answer:
10 units
Step-by-step explanation:
We are given that
BD=x+29
AD=x+39
AC=20
BC=x+19
AC=AB+BC
20=AB+x+19
AB=20-x-19=1-x
AD=AB+BD
Substitute the value of x=-9
Then , we get BC= units
Answer: BC=10 units
1st question: C
2nd question: A
6.50
thats what i get
-1
don't really have a step by step explanation but it was kinda easy if you just put it in the calculator