In an arithmetic sequence, find a50 when a1=7 and d=5
a. 495
b. 252
c. 275
d. 349

An arithmetic sequence is an ordered list of numbers where the next number is found by adding the same amount to the number before. (2,5,8,11... is one where you add 3 to get the next number)
The equation for arithmetic sequence is

where  is the "n th" number in the sequence
( is the first number in the sequence)
d is the number you add to get the next number







The answer is B. 252

A. -10 is the value of x