#### Answer

$Vec(x_{1})=(20m)x$
$Vec(x_{2})=(15m)x$
So, a). $vec(x_{1})+vec(x_{2})=(35m)x,$
b). $vec(x_{1})-vec(x_{2})=(5m)x,$
c). $vec(x_{2})-vec(x_{1})=(-5m)x.$
Graph is shown.

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Published by
Pearson

ISBN 10:
0-32160-183-1

ISBN 13:
978-0-32160-183-4

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