Answer:
11. is false
12. is true
Step-by-step explanation:
everything is based on the angle
Answer: The missing number in the sequence is 
Step-by-step explanation:
Since we have given that

First term = a= 
Common difference = d is given by

Therefore, it forms an arithmetic sequence.
Since,
is missing,
So,

Hence, the missing number in the sequence is 
Answer:
$9
Step-by-step explanation:
divide 45 and 5, you get 9
Answer:
40/10
Step-by-step explanation: