Using
sum = (n-2)180
= (15-2)180 = 13×180 = 2340°
Answer: it's 31.5
Step-by-step explanation:because you would times 9 by 21 then divide by 6
9*21=189
189/6=31.5
Answer:
11x-2
Step-by-step explanation:
4x-3+7x+1
then
4x+7x-3+1
goes to
4x+7x-2
Answer: 11x-2