Answer:

Step-by-step explanation:
since
, We can substitue for 
The correct answers are number two, and number six
Answer:
11. C=5
12. SQRT (43)
Step-by-step explanation:
11. 3^2+4^2=9+16=25
12. 8^2-4^2=64−16=48
First box 12. Second 7. Third 2. Fourth -3. Fifth -8.