The sum of the first 10 terms of the arithmetic sequence 2, 5, 8, 11, ... is: A 150 B 155 C 145 D 160 ✓ Correct Answer: Option B a₁=2, d=3, a₁₀=2+9(3)=29. S₁₀= 10(2+29)/2 = 10(31)/2 = 155. Practice CLEP Exam Prep Quizzes → Browse All Questions Study Flashcards