Choose an expression that matches the following sentence: The sum of 5 times a number plus 2. A. 5x + 2 B. 5 + 2 C. 5x – 2 D. 2 + 5 + x E. 2 - 5

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio