Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 8 - Review - Page 532: 71b

Answer

2022

Work Step by Step

$y=99000$ $y=-32x^2+1733x+76362$ $99000=-32x^2+1733x+76362$ $99000-99000=-32x^2+1733x+76362-99000$ $0=-32x^2+1733x-22638$ $a=-32$, $b=1733$, $c=-22638$ $x=(-b±\sqrt {b^2-4ac})/2a$ $x=(-1733±\sqrt {(1733)^2-4*-32*-22638})/2*-32$ $x=(-1733±\sqrt {3003289 -2897664})/-64$ $x=(-1733±\sqrt {105625})/-64$ $x=(-1733±325)/-64$ $x=(-1733+325)/-64$ $x=-1408/-64$ $x=22$ $x=(-1733-325)/-64$ $x=-2058/-64$ $x=32.15$ $2000+22=2022$
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