Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 12 - Data Analysis and Probability - 12-3 Measures of Central Tendency and Dispersion - Practice and Problem-Solving Exercises - Page 742: 14

Answer

39.1

Work Step by Step

We use the standard equation for average, where x is the unknown value. $(31.7+42.8+26.4+x)/4 = 35\\ (31.7+42.8+26.4+x) = 140\\ x = 39.1$
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