13. The following illustrates an arithmetic sequence EXCEPT; A. 2, 6, 10, 14, C. 3, 5, 7, 9,... B. 2,5,8,11,14, D. 2, 6, 18, 54, 14. Find the sum of the first 20 multiples of 7. A.1470 B. 1400 C. 1480 D. 1570 15. What is the 100th term of arithmetic sequence 2,5,8 ...? A 297 B. 296 C. 298 D. 299 16. Find the missing term in the arithmetic sequence 5, 12, A. 19 B. 18 C. 17 D.20 17. The 4th term of an arithmetic sequence is 28 and the 15th te A. 5 B.6 0.7 D.8 18. Find the sum of the multiples of 3 from 15 to 45. A 300 B.330 C. 360 D. 350​