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
\(A_{n} = A_{1} +(n-1)d\)
where \(A_{n}\) is the "n th" number in the sequence
(\(A_{1}\) is the first number in the sequence)
d is the number you add to get the next number
\(A_{n} = A_{1} +(n-1)d\)
\(A_{50} = 7 +(50-1)(5)\)
\(A_{50} = 7 +(49)(5)\)
\(A_{50} = 7 +245\)
\(A_{50} =252\)
The answer is B. 252
