S = n(a1 + an)/2
2S = n(a1 + an)
2S = na1 + nan
nan = 2S - na1
an = (2S - n a1)/n
The value of a would be 3.5, as a=1 when b=10 means that a is worth 1/10 of b's value.
I am pretty sure it is 120 or 30
Answer:No because if you add 5 plus 4 you will get nine but when u subtract 5 from four you will get 1 so no it would not get you any of those
Step-by-step explanation: