THE ANSWER IS EQUILATERAL BECAUSE THEY ALL HAVE EQUAL SIDES
Answer:
27 days
Step-by-step explanation:
20 
÷ 
= 27
-3...idk what your asking...but on a number line, 3 places to the left of zero is negative three
Answer: First Option : Sₙ= n/2(a₁ + aₙ)
Step-by-step explanation:
The nth partial sum of an arithmetic sequence or the sum of the first n terms of the arithmetic series can be defined as the sum of a finite number of term in an arithmetic sequence.
It is calculated using the formula:
Sₙ= n/2(a₁ + aₙ)
Where :
a₁ = First term
aₙ = last term
n = number of terms
