Answer: I really don't know yet.
Step-by-step explanation:
Another day. 
Answer:
the right answer is 170
Step-by-step explanation:
so the 90° angle had been divided into 2 so x is 45°
therefore 45×4 is 180 -10= 170
24 times 2 equals 48 , 24 times 3 equals 72 . Therefore it’s A
Sn = n/2 (a1+an)
= 8/2 (3-38)
= 4 (-35)
= -140