Find the indicated quantity.
-a5, when a10 = 37 and a15 = 57
A)4
B)1
C)17
D)21

Name: Find the indicated quantity. -a5, when a10 = 37 and a15 = 57 A)4 B)1 C)17 D)21
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Quizplus · Accepted Answer

The sequence appears to be arithmetic, where the difference between terms is constant. Given a10 = 37 and a15 = 57, the difference between these terms is 57 - 37 = 20 over 5 steps, so the common difference is 20/5 = 4. To find a5, we subtract this difference from a10: 37 - 4*5 = 37 - 20 = 17.

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