Question

PLEASE HELP I HAVE ONLY TILL 11:59 TO GET THESE QUESTIONS DONE.

What is the common difference of a 57-term arithmetic sequence where the first term is -25 and the sum is 17,727? (1 points)
Answer

11

11.5

12

12.5


What is the sum of a 14-term arithmetic sequence where the last term is 30 and the common difference is -5? (1 points)
Answer

875

812.5

455

422.5