Answer:
i think its 4
Step-by-step explanation:
(51 - 11) : 2 = 20
20 + 11 = 31
20 and 31
might wanna show us the table
28
because in this series the gap between number is gradually increasing from 1 and so this times its the turn of number 7 so 21+ 7 = 28
c is the answer i know this because im smart and because c is the answer
1 - √3 cot (x + 15) = 0
√3 cot(x + 15) = 1
tan (x + 15) = √3
x + 15 = 60
x = 45 degrees answer
