1. You find each term by adding 7 to the previous term. The next three terms are 31, 38, and 45. Find the next three terms in the sequence 3, 10, 17, 24,.... Sequences COURSE 3 LESSON 12-1 12-1

2. The common difference for this sequence is –1.2. The next three terms are 7.6, 6.4, and 5.2. Find the common difference in the arithmetic sequence 12.4, 11.2, 10, 8.8,.... Write the rule for the sequence and find the next three terms. Sequences COURSE 3 LESSON 12-1 The rule is, Start with 12.4 and add –1.2 repeatedly. 12-1

3. The common ratio is 4. The next three terms are 640; 2,560; and 10,240. A scientist isolates 10 cells in a dish. The next day there are 40 cells in the dish. The day after there are 160 cells. Write the rule for the geometric sequence and find the next three terms. Sequences COURSE 3 LESSON 12-1 The rule is, Start with 10 and multiply by 4 repeatedly. 12-1