#### Answer

Fill the blank with
$(-1, 9)$

#### Work Step by Step

The center of the ellipse is the midpoint of its foci.
$(\displaystyle \frac{-8+10}{2}, \frac{6+12}{2}) =(-1, 9)$
Fill the blank with
$(-1, 9)$

Published by
Pearson

ISBN 10:
0-32178-228-3

ISBN 13:
978-0-32178-228-1

Fill the blank with
$(-1, 9)$

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