Which one will we start with? I'll explain 21. multiply it out and the clean it up. you should end up with 140=A if I'm correct.
Answer:
C
Step-by-step explanation:

Answer:
Step-by-step explanation:
x²+y²=r²
r²=12
r=√12=2√3
94 seats
There are 2 ways to do this one:
1. 18 x 3 = 54
54 + 40 = 94
2. 40 + 3 + 3 + 3.... and so on.
Let me know if this was helpful!