Answer
a.
$y^{-3}$
b.
$z^{-2}$
c.
$x^{-4}$
Work Step by Step
a.
$y^{2}y^{-5} = y^{2-5} = y^{-3}$
b.
$z^{5}z^{-3}z^{-4} = z^{5-3-4}=z^{-2}$
c.
$\frac{x^{6}}{x^{10}} = x^{6-10} =x^{-4}$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter P, Prerequisites - Section P.3 - Integer Exponents and Scientific Notation - P.3 Exercises - Page 23: 22
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