Answer
Add 6
Work Step by Step
An octagon has 8 sides (Octa=8). In the two octagons, two of the sides are shared between the left and right octagon,
so 8-2 = 6
Therefore we will add 6.
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 4 - An Introduction to Functions - 4-1 Using Graphs to Relate Two Quantities - Practice and Problem-Solving Exercises - Page 244: 18
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