Answer :

Final answer:

The common difference of the arithmetic sequence 45, 40, 35, 30, 25, ... is -5. The sequence decreases by 5 each term, making -5 the common difference.

Explanation:

The student has asked for the common difference in the arithmetic sequence 45, 40, 35, 30, 25, ... To find the common difference, we subtract any term in the sequence from the term that follows it. Let's use the first two terms as an example:

  • 40 (second term) - 45 (first term) = -5

This calculation tells us that the common difference is -5. Therefore, the correct answer is b. -5.

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Rewritten by : Barada