Find the 91st term of the arithmetic sequence 28, 8, -12, ...

Step-by-step explanation:

The explicit formula for an arithmetic sequence is

where n is the position of the number in the sequence, a1 is the first number in the sequence, and d is the common difference between the numbers.  

If we are looking for the 91st term, our n = 91;

our a1 is 28, and

the common difference is -20.  Putting all that together gives us the explicit formula for this sequence:

and

and

so

for the first question it would be the second answer for the second question it would be the third answer and for the third question it would be the first answer

step-by-step explanation:

42

step-by-step explanation:

256/6=42