You plug 8 into where n is so it's 8-5
8-5= 3 so the answer is A
Answer:
the answer to this question is very simple
its
33.75°
It would be A=18 because of the equation a^2+b^2=c^2.
Answer:
S
ThenSn=n(a1+an)2Sn=n(a1 + an)2 , where nn is the number of terms, a1a1 is the first term and anan is the last term. The sum of the first nn terms of an arithmetic sequence is called an arithmetic series .
Step-by-step explanation:
