Lines AB and CD are parallel. If 23 measures (3x + 20), and 24 measures 70°, which equation could be used to solve for x? A. (3x + 20°) +70° = 180°
B. (3x + 20°) +60° = 180°
C. (3x + 20°) + 180° = 70°
D. (3x + 20) = 70°

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