#### Answer

8$z^{2}$-6.1z+17.3

#### Work Step by Step

(-$z^{2}$-4.2z+11)+(9$z^{2}$-1.9z+6.3)
=-$z^{2}$-4.2z+11+9$z^{2}$-1.9z+6.3
=8$z^{2}$-6.1z+17.3

Published by
Pearson

ISBN 10:
0321955048

ISBN 13:
978-0-32195-504-3

8$z^{2}$-6.1z+17.3

(-$z^{2}$-4.2z+11)+(9$z^{2}$-1.9z+6.3)
=-$z^{2}$-4.2z+11+9$z^{2}$-1.9z+6.3
=8$z^{2}$-6.1z+17.3

You can help us out by revising, improving and updating this answer.

Update this answerAfter you claim an answer you’ll have **24 hours** to send in a draft. An editor
will review the submission and either publish your submission or provide feedback.