#### Answer

$-4$

#### Work Step by Step

Formula:
ad-bc
$(4*-1)-(5*0)$
$-4-0=-4$

Published by
Brooks Cole

ISBN 10:
1305071751

ISBN 13:
978-1-30507-175-9

$-4$

Formula:
ad-bc
$(4*-1)-(5*0)$
$-4-0=-4$

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