Answer:
21
Step-by-step explanation:
y+9 = ?
y=12
12+9=21
B+B=2
assuming that B is 1 I will say that 4 is C.
4+1*2= 10 is your answer.
It's 248.3333 (but with the 3s repeating)
2,7) is the answer to this question
Answer:

Step-by-step explanation:
Apply pythagorean theorem:
ABD is a right triangle with angle ADB = 90
hence AD =
where BD = 10 because it is half of BC
AD =
= 